21164701407 has 16 divisors (see below), whose sum is σ = 30996360960. Its totient is φ = 12785997312.

The previous prime is 21164701391. The next prime is 21164701423. The reversal of 21164701407 is 70410746112.

It is an interprime number because it is at equal distance from previous prime (21164701391) and next prime (21164701423).

It is not a de Polignac number, because 21164701407 - 2⁴ = 21164701391 is a prime.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (21164701487) 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, 8070658 + ... + 8073279.

It is an arithmetic number, because the mean of its divisors is an integer number (1937272560).

Almost surely, 2^21164701407 is an apocalyptic number.

21164701407 is a deficient number, since it is larger than the sum of its proper divisors (9831659553).

21164701407 is a wasteful number, since it uses less digits than its factorization.

21164701407 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 16143982.

The product of its (nonzero) digits is 9408, while the sum is 33.

The spelling of 21164701407 in words is "twenty-one billion, one hundred sixty-four million, seven hundred one thousand, four hundred seven".