21057723027 has 48 divisors (see below), whose sum is σ = 33989155200. Its totient is φ = 12452388480.

The previous prime is 21057722999. The next prime is 21057723031. The reversal of 21057723027 is 72032775012.

It is not a de Polignac number, because 21057723027 - 2⁸ = 21057722771 is a prime.

It is a junction number, because it is equal to n+sod(n) for n = 21057722982 and 21057723000.

It is not an unprimeable number, because it can be changed into a prime (21057723227) by changing a digit.

It is a polite number, since it can be written in 47 ways as a sum of consecutive naturals, for example, 5357599 + ... + 5361527.

It is an arithmetic number, because the mean of its divisors is an integer number (708107400).

Almost surely, 2^21057723027 is an apocalyptic number.

21057723027 is a deficient number, since it is larger than the sum of its proper divisors (12931432173).

21057723027 is a wasteful number, since it uses less digits than its factorization.

21057723027 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 5248 (or 5245 counting only the distinct ones).

The product of its (nonzero) digits is 41160, while the sum is 36.

The spelling of 21057723027 in words is "twenty-one billion, fifty-seven million, seven hundred twenty-three thousand, twenty-seven".