21872583045 has 48 divisors (see below), whose sum is σ = 39284923392. Its totient is φ = 11245962240.

The previous prime is 21872583043. The next prime is 21872583097. The reversal of 21872583045 is 54038527812.

21872583045 is a `hidden beast` number, since 21 + 8 + 7 + 2 + 583 + 0 + 45 = 666.

It is not a de Polignac number, because 21872583045 - 2¹ = 21872583043 is a prime.

It is a Harshad number since it is a multiple of its sum of digits (45).

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (21872583043) by changing a digit.

It is a polite number, since it can be written in 47 ways as a sum of consecutive naturals, for example, 337077 + ... + 396693.

It is an arithmetic number, because the mean of its divisors is an integer number (818435904).

Almost surely, 2^21872583045 is an apocalyptic number.

It is an amenable number.

21872583045 is a deficient number, since it is larger than the sum of its proper divisors (17412340347).

21872583045 is a wasteful number, since it uses less digits than its factorization.

21872583045 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 59922 (or 59919 counting only the distinct ones).

The product of its (nonzero) digits is 537600, while the sum is 45.

The spelling of 21872583045 in words is "twenty-one billion, eight hundred seventy-two million, five hundred eighty-three thousand, forty-five".