21336630590 has 24 divisors (see below), whose sum is σ = 42214790520. Its totient is φ = 7758774320.

The previous prime is 21336630527. The next prime is 21336630643. The reversal of 21336630590 is 9503663312.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 8815580 + ... + 8817999.

It is an arithmetic number, because the mean of its divisors is an integer number (1758949605).

Almost surely, 2^21336630590 is an apocalyptic number.

21336630590 is a deficient number, since it is larger than the sum of its proper divisors (20878159930).

21336630590 is a wasteful number, since it uses less digits than its factorization.

21336630590 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 17633608 (or 17633597 counting only the distinct ones).

The product of its (nonzero) digits is 87480, while the sum is 38.

The spelling of 21336630590 in words is "twenty-one billion, three hundred thirty-six million, six hundred thirty thousand, five hundred ninety".