20602140 has 96 divisors (see below), whose sum is σ = 63287616. Its totient is φ = 4976640.

The previous prime is 20602123. The next prime is 20602157. The reversal of 20602140 is 4120602.

It is an interprime number because it is at equal distance from previous prime (20602123) and next prime (20602157).

It is a Harshad number since it is a multiple of its sum of digits (15).

It is a congruent number.

It is an unprimeable number.

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 31 ways as a sum of consecutive naturals, for example, 47364 + ... + 47796.

It is an arithmetic number, because the mean of its divisors is an integer number (659246).

Almost surely, 2^20602140 is an apocalyptic number.

20602140 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 20602140, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (31643808).

20602140 is an abundant number, since it is smaller than the sum of its proper divisors (42685476).

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

20602140 is a wasteful number, since it uses less digits than its factorization.

20602140 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 519 (or 517 counting only the distinct ones).

The product of its (nonzero) digits is 96, while the sum is 15.

The square root of 20602140 is about 4538.9580302091. The cubic root of 20602140 is about 274.1389708301.

Adding to 20602140 its reverse (4120602), we get a palindrome (24722742).

The spelling of 20602140 in words is "twenty million, six hundred two thousand, one hundred forty".