20657803036 has 24 divisors (see below), whose sum is σ = 38945007920. Its totient is φ = 9531188352.

The previous prime is 20657803031. The next prime is 20657803069. The reversal of 20657803036 is 63030875602.

It is a self number, because there is not a number n which added to its sum of digits gives 20657803036.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (20657803031) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 94720 + ... + 224248.

Almost surely, 2^20657803036 is an apocalyptic number.

20657803036 is a gapful number since it is divisible by the number (26) formed by its first and last digit.

It is an amenable number.

20657803036 is a deficient number, since it is larger than the sum of its proper divisors (18287204884).

20657803036 is a wasteful number, since it uses less digits than its factorization.

20657803036 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 132613 (or 132611 counting only the distinct ones).

The product of its (nonzero) digits is 181440, while the sum is 40.

The spelling of 20657803036 in words is "twenty billion, six hundred fifty-seven million, eight hundred three thousand, thirty-six".