20613765500 has 48 divisors (see below), whose sum is σ = 46572926400. Its totient is φ = 7961172800.

The previous prime is 20613765461. The next prime is 20613765503. The reversal of 20613765500 is 556731602.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (20613765503) 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, 696320 + ... + 725319.

It is an arithmetic number, because the mean of its divisors is an integer number (970269300).

Almost surely, 2^20613765500 is an apocalyptic number.

20613765500 is a gapful number since it is divisible by the number (20) formed by its first and last digit.

It is an amenable number.

20613765500 is an abundant number, since it is smaller than the sum of its proper divisors (25959160900).

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

20613765500 is a wasteful number, since it uses less digits than its factorization.

20613765500 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1421687 (or 1421675 counting only the distinct ones).

The product of its (nonzero) digits is 37800, while the sum is 35.

The spelling of 20613765500 in words is "twenty billion, six hundred thirteen million, seven hundred sixty-five thousand, five hundred".