20392620 has 48 divisors (see below), whose sum is σ = 57915648. Its totient is φ = 5360320.

The previous prime is 20392613. The next prime is 20392627. The reversal of 20392620 is 2629302.

It is an interprime number because it is at equal distance from previous prime (20392613) and next prime (20392627).

It is not an unprimeable number, because it can be changed into a prime (20392627) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 1867 + ... + 6653.

It is an arithmetic number, because the mean of its divisors is an integer number (1206576).

Almost surely, 2^20392620 is an apocalyptic number.

20392620 is a gapful number since it is divisible by the number (20) formed by its first and last digit.

It is an amenable number.

It is a practical number, because each smaller number is the sum of distinct divisors of 20392620, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (28957824).

20392620 is an abundant number, since it is smaller than the sum of its proper divisors (37523028).

It is a pseudoperfect number, because it is the sum of a subset of its proper divisors.

20392620 is a wasteful number, since it uses less digits than its factorization.

20392620 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 4870 (or 4868 counting only the distinct ones).

The product of its (nonzero) digits is 1296, while the sum is 24.

The square root of 20392620 is about 4515.8188626206. The cubic root of 20392620 is about 273.2064881733.

It can be divided in two parts, 20392 and 620, that added together give a palindrome (21012).

The spelling of 20392620 in words is "twenty million, three hundred ninety-two thousand, six hundred twenty".