21375437003870 has 16 divisors (see below), whose sum is σ = 38752590829680. Its totient is φ = 8488662752064.

The previous prime is 21375437003839. The next prime is 21375437003959. The reversal of 21375437003870 is 7830073457312.

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, 7689004727 + ... + 7689007506.

It is an arithmetic number, because the mean of its divisors is an integer number (2422036926855).

Almost surely, 2^{21375437003870} is an apocalyptic number.

21375437003870 is a deficient number, since it is larger than the sum of its proper divisors (17377153825810).

21375437003870 is a wasteful number, since it uses less digits than its factorization.

21375437003870 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 15378012379.

The product of its (nonzero) digits is 2963520, while the sum is 50.

The spelling of 21375437003870 in words is "twenty-one trillion, three hundred seventy-five billion, four hundred thirty-seven million, three thousand, eight hundred seventy".