21753447001 has 32 divisors (see below), whose sum is σ = 25913115648. Its totient is φ = 18001496640.

The previous prime is 21753446987. The next prime is 21753447029. The reversal of 21753447001 is 10074435712.

It is a cyclic number.

It is not a de Polignac number, because 21753447001 - 2¹³ = 21753438809 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (21753447071) by changing a digit.

It is a polite number, since it can be written in 31 ways as a sum of consecutive naturals, for example, 3470196 + ... + 3476458.

It is an arithmetic number, because the mean of its divisors is an integer number (809784864).

Almost surely, 2^21753447001 is an apocalyptic number.

It is an amenable number.

21753447001 is a deficient number, since it is larger than the sum of its proper divisors (4159668647).

21753447001 is a wasteful number, since it uses less digits than its factorization.

21753447001 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 6621.

The product of its (nonzero) digits is 23520, while the sum is 34.

The spelling of 21753447001 in words is "twenty-one billion, seven hundred fifty-three million, four hundred forty-seven thousand, one".