21752770045 has 8 divisors (see below), whose sum is σ = 26249153760. Its totient is φ = 17304996240.

The previous prime is 21752770021. The next prime is 21752770063. The reversal of 21752770045 is 54007725712.

It is a sphenic number, since it is the product of 3 distinct primes.

It is not a de Polignac number, because 21752770045 - 2³³ = 13162835453 is a prime.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 12151491 + ... + 12153280.

It is an arithmetic number, because the mean of its divisors is an integer number (3281144220).

Almost surely, 2^21752770045 is an apocalyptic number.

It is an amenable number.

21752770045 is a deficient number, since it is larger than the sum of its proper divisors (4496383715).

21752770045 is a wasteful number, since it uses less digits than its factorization.

21752770045 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 24304955.

The product of its (nonzero) digits is 137200, while the sum is 40.

The spelling of 21752770045 in words is "twenty-one billion, seven hundred fifty-two million, seven hundred seventy thousand, forty-five".