20612513286 has 32 divisors (see below), whose sum is σ = 46210957920. Its totient is φ = 6810031872.

The previous prime is 20612513281. The next prime is 20612513303. The reversal of 20612513286 is 68231521602.

20612513286 is a `hidden beast` number, since 2 + 0 + 61 + 2 + 513 + 2 + 86 = 666.

It is a self number, because there is not a number n which added to its sum of digits gives 20612513286.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (20612513281) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 1682895 + ... + 1695098.

It is an arithmetic number, because the mean of its divisors is an integer number (1444092435).

Almost surely, 2^20612513286 is an apocalyptic number.

20612513286 is an abundant number, since it is smaller than the sum of its proper divisors (25598444634).

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

20612513286 is a wasteful number, since it uses less digits than its factorization.

20612513286 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 3378117 (or 3378111 counting only the distinct ones).

The product of its (nonzero) digits is 34560, while the sum is 36.

The spelling of 20612513286 in words is "twenty billion, six hundred twelve million, five hundred thirteen thousand, two hundred eighty-six".