21754575029 has 4 divisors (see below), whose sum is σ = 23732263680. Its totient is φ = 19776886380.

The previous prime is 21754575023. The next prime is 21754575043. The reversal of 21754575029 is 92057545712.

It is a semiprime because it is the product of two primes, and also a Blum integer, because the two primes are equal to 3 mod 4.

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-21754575029 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 (21754575023) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 988844309 + ... + 988844330.

It is an arithmetic number, because the mean of its divisors is an integer number (5933065920).

Almost surely, 2^21754575029 is an apocalyptic number.

It is an amenable number.

21754575029 is a deficient number, since it is larger than the sum of its proper divisors (1977688651).

21754575029 is a wasteful number, since it uses less digits than its factorization.

21754575029 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1977688650.

The product of its (nonzero) digits is 882000, while the sum is 47.

The spelling of 21754575029 in words is "twenty-one billion, seven hundred fifty-four million, five hundred seventy-five thousand, twenty-nine".