20892420 has 72 divisors (see below), whose sum is σ = 65107224. Its totient is φ = 5419008.

The previous prime is 20892407. The next prime is 20892427. The reversal of 20892420 is 2429802.

It can be written as a sum of positive squares in 4 ways, for example, as 13307904 + 7584516 = 3648^2 + 2754^2 .

It is not an unprimeable number, because it can be changed into a prime (20892427) by changing a digit.

It is a polite number, since it can be written in 23 ways as a sum of consecutive naturals, for example, 5092 + ... + 8228.

It is an arithmetic number, because the mean of its divisors is an integer number (904267).

Almost surely, 2^20892420 is an apocalyptic number.

20892420 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 20892420, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (32553612).

20892420 is an abundant number, since it is smaller than the sum of its proper divisors (44214804).

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

20892420 is a wasteful number, since it uses less digits than its factorization.

20892420 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 3189 (or 3184 counting only the distinct ones).

The product of its (nonzero) digits is 2304, while the sum is 27.

The square root of 20892420 is about 4570.8226830626. The cubic root of 20892420 is about 275.4204917012.

It can be divided in two parts, 20892 and 420, that added together give a palindrome (21312).

The spelling of 20892420 in words is "twenty million, eight hundred ninety-two thousand, four hundred twenty".