21373472735500 has 24 divisors (see below), whose sum is σ = 46679664455424. Its totient is φ = 8549389094000.

The previous prime is 21373472735453. The next prime is 21373472735507. The reversal of 21373472735500 is 553727437312.

It is not an unprimeable number, because it can be changed into a prime (21373472735507) 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, 21373472236 + ... + 21373473235.

It is an arithmetic number, because the mean of its divisors is an integer number (1944986018976).

Almost surely, 2^{21373472735500} is an apocalyptic number.

21373472735500 is a gapful number since it is divisible by the number (20) formed by its first and last digit.

It is an amenable number.

21373472735500 is an abundant number, since it is smaller than the sum of its proper divisors (25306191719924).

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

21373472735500 is a wasteful number, since it uses less digits than its factorization.

21373472735500 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 42746945490 (or 42746945478 counting only the distinct ones).

The product of its (nonzero) digits is 3704400, while the sum is 49.

The spelling of 21373472735500 in words is "twenty-one trillion, three hundred seventy-three billion, four hundred seventy-two million, seven hundred thirty-five thousand, five hundred".