21370376503 has 16 divisors (see below), whose sum is σ = 24895999296. Its totient is φ = 17963262720.

The previous prime is 21370376479. The next prime is 21370376509. The reversal of 21370376503 is 30567307312.

It is a cyclic number.

It is not a de Polignac number, because 21370376503 - 2⁵ = 21370376471 is a prime.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (21370376509) 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, 833625 + ... + 858877.

It is an arithmetic number, because the mean of its divisors is an integer number (1555999956).

Almost surely, 2^21370376503 is an apocalyptic number.

21370376503 is a deficient number, since it is larger than the sum of its proper divisors (3525622793).

21370376503 is a wasteful number, since it uses less digits than its factorization.

21370376503 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 27594.

The product of its (nonzero) digits is 79380, while the sum is 37.

The spelling of 21370376503 in words is "twenty-one billion, three hundred seventy million, three hundred seventy-six thousand, five hundred three".