21753020076 has 48 divisors (see below), whose sum is σ = 51117638880. Its totient is φ = 7199562240.

The previous prime is 21753020039. The next prime is 21753020099. The reversal of 21753020076 is 67002035712.

It is an unprimeable number.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 3239010 + ... + 3245718.

It is an arithmetic number, because the mean of its divisors is an integer number (1064950810).

Almost surely, 2^21753020076 is an apocalyptic number.

It is an amenable number.

21753020076 is an abundant number, since it is smaller than the sum of its proper divisors (29364618804).

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

21753020076 is a wasteful number, since it uses less digits than its factorization.

21753020076 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 8594 (or 8592 counting only the distinct ones).

The product of its (nonzero) digits is 17640, while the sum is 33.

Adding to 21753020076 its reverse (67002035712), we get a palindrome (88755055788).

The spelling of 21753020076 in words is "twenty-one billion, seven hundred fifty-three million, twenty thousand, seventy-six".