21880373845 has 16 divisors (see below), whose sum is σ = 28654819200. Its totient is φ = 15906654400.

The previous prime is 21880373831. The next prime is 21880373849. The reversal of 21880373845 is 54837308812.

It is not a de Polignac number, because 21880373845 - 2¹¹ = 21880371797 is a prime.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (21880373849) 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, 62160 + ... + 218230.

It is an arithmetic number, because the mean of its divisors is an integer number (1790926200).

Almost surely, 2^21880373845 is an apocalyptic number.

It is an amenable number.

21880373845 is a deficient number, since it is larger than the sum of its proper divisors (6774445355).

21880373845 is a wasteful number, since it uses less digits than its factorization.

21880373845 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 158636.

The product of its (nonzero) digits is 1290240, while the sum is 49.

The spelling of 21880373845 in words is "twenty-one billion, eight hundred eighty million, three hundred seventy-three thousand, eight hundred forty-five".