21902377495 has 4 divisors (see below), whose sum is σ = 26282853000. Its totient is φ = 17521901992.

The previous prime is 21902377477. The next prime is 21902377501. The reversal of 21902377495 is 59477320912.

It is a happy number.

It is a semiprime because it is the product of two primes.

It is a cyclic number.

It is not a de Polignac number, because 21902377495 - 2¹⁷ = 21902246423 is a prime.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 2190237745 + ... + 2190237754.

It is an arithmetic number, because the mean of its divisors is an integer number (6570713250).

Almost surely, 2^21902377495 is an apocalyptic number.

21902377495 is a deficient number, since it is larger than the sum of its proper divisors (4380475505).

21902377495 is an equidigital number, since it uses as much as digits as its factorization.

21902377495 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 4380475504.

The product of its (nonzero) digits is 952560, while the sum is 49.

The spelling of 21902377495 in words is "twenty-one billion, nine hundred two million, three hundred seventy-seven thousand, four hundred ninety-five".