21023701707 has 8 divisors (see below), whose sum is σ = 28042600960. Its totient is φ = 14010301800.

The previous prime is 21023701679. The next prime is 21023701711. The reversal of 21023701707 is 70710732012.

It is a sphenic number, since it is the product of 3 distinct primes.

It is not a de Polignac number, because 21023701707 - 2⁷ = 21023701579 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (21023703707) 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, 1365907 + ... + 1381212.

It is an arithmetic number, because the mean of its divisors is an integer number (3505325120).

Almost surely, 2^21023701707 is an apocalyptic number.

21023701707 is a deficient number, since it is larger than the sum of its proper divisors (7018899253).

21023701707 is a wasteful number, since it uses less digits than its factorization.

21023701707 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 2749673.

The product of its (nonzero) digits is 4116, while the sum is 30.

The spelling of 21023701707 in words is "twenty-one billion, twenty-three million, seven hundred one thousand, seven hundred seven".