21370776590 has 32 divisors (see below), whose sum is σ = 39998202624. Its totient is φ = 8212158720.

The previous prime is 21370776589. The next prime is 21370776601. The reversal of 21370776590 is 9567707312.

It is a Smith number, since the sum of its digits (47) coincides with the sum of the digits of its prime factors. Since it is squarefree, it is also a hoax number.

It is a congruent number.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 209129 + ... + 294068.

It is an arithmetic number, because the mean of its divisors is an integer number (1249943832).

Almost surely, 2^21370776590 is an apocalyptic number.

21370776590 is a deficient number, since it is larger than the sum of its proper divisors (18627426034).

21370776590 is a wasteful number, since it uses less digits than its factorization.

21370776590 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 503372.

The product of its (nonzero) digits is 555660, while the sum is 47.

The spelling of 21370776590 in words is "twenty-one billion, three hundred seventy million, seven hundred seventy-six thousand, five hundred ninety".