21590909070 has 64 divisors (see below), whose sum is σ = 52282713600. Its totient is φ = 5706136448.

The previous prime is 21590909057. The next prime is 21590909083. The reversal of 21590909070 is 7090909512.

It is an interprime number because it is at equal distance from previous prime (21590909057) and next prime (21590909083).

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 31 ways as a sum of consecutive naturals, for example, 2082319 + ... + 2092661.

It is an arithmetic number, because the mean of its divisors is an integer number (816917400).

Almost surely, 2^21590909070 is an apocalyptic number.

21590909070 is an abundant number, since it is smaller than the sum of its proper divisors (30691804530).

It is a pseudoperfect number, because it is the sum of a subset of its proper divisors.

21590909070 is a wasteful number, since it uses less digits than its factorization.

21590909070 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 10969.

The product of its (nonzero) digits is 51030, while the sum is 42.

The spelling of 21590909070 in words is "twenty-one billion, five hundred ninety million, nine hundred nine thousand, seventy".