20612536 has 24 divisors (see below), whose sum is σ = 44959320. Its totient is φ = 8833776.

The previous prime is 20612521. The next prime is 20612539. The reversal of 20612536 is 63521602.

It is a self number, because there is not a number n which added to its sum of digits gives 20612536.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (20612539) by changing a digit.

It is a polite number, since it can be written in 5 ways as a sum of consecutive naturals, for example, 25900 + ... + 26683.

It is an arithmetic number, because the mean of its divisors is an integer number (1873305).

Almost surely, 2^20612536 is an apocalyptic number.

It is an amenable number.

20612536 is an abundant number, since it is smaller than the sum of its proper divisors (24346784).

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

20612536 is a wasteful number, since it uses less digits than its factorization.

20612536 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 52603 (or 52592 counting only the distinct ones).

The product of its (nonzero) digits is 2160, while the sum is 25.

The square root of 20612536 is about 4540.1030825302. The cubic root of 20612536 is about 274.1850739615.

The spelling of 20612536 in words is "twenty million, six hundred twelve thousand, five hundred thirty-six".