21064087430 has 16 divisors (see below), whose sum is σ = 38840122944. Its totient is φ = 8220131520.

The previous prime is 21064087411. The next prime is 21064087441. The reversal of 21064087430 is 3478046012.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 25687502 + ... + 25688321.

It is an arithmetic number, because the mean of its divisors is an integer number (2427507684).

Almost surely, 2^21064087430 is an apocalyptic number.

21064087430 is a deficient number, since it is larger than the sum of its proper divisors (17776035514).

21064087430 is a wasteful number, since it uses less digits than its factorization.

21064087430 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 51375871.

The product of its (nonzero) digits is 32256, while the sum is 35.

The spelling of 21064087430 in words is "twenty-one billion, sixty-four million, eighty-seven thousand, four hundred thirty".