21920580590 has 16 divisors (see below), whose sum is σ = 39599494272. Its totient is φ = 8736576864.

The previous prime is 21920580569. The next prime is 21920580601. The reversal of 21920580590 is 9508502912.

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 7 ways as a sum of consecutive naturals, for example, 3954014 + ... + 3959553.

It is an arithmetic number, because the mean of its divisors is an integer number (2474968392).

Almost surely, 2^21920580590 is an apocalyptic number.

21920580590 is a deficient number, since it is larger than the sum of its proper divisors (17678913682).

21920580590 is a wasteful number, since it uses less digits than its factorization.

21920580590 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 7913851.

The product of its (nonzero) digits is 64800, while the sum is 41.

The spelling of 21920580590 in words is "twenty-one billion, nine hundred twenty million, five hundred eighty thousand, five hundred ninety".