21980608573 has 16 divisors (see below), whose sum is σ = 27416566656. Its totient is φ = 17120139840.

The previous prime is 21980608567. The next prime is 21980608577. The reversal of 21980608573 is 37580608912.

It is a cyclic number.

It is not a de Polignac number, because 21980608573 - 2²⁵ = 21947054141 is a prime.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (21980608577) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 114315 + ... + 238807.

It is an arithmetic number, because the mean of its divisors is an integer number (1713535416).

Almost surely, 2^21980608573 is an apocalyptic number.

It is an amenable number.

21980608573 is a deficient number, since it is larger than the sum of its proper divisors (5435958083).

21980608573 is a wasteful number, since it uses less digits than its factorization.

21980608573 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 126804.

The product of its (nonzero) digits is 725760, while the sum is 49.

The spelling of 21980608573 in words is "twenty-one billion, nine hundred eighty million, six hundred eight thousand, five hundred seventy-three".