21752451053 has 8 divisors (see below), whose sum is σ = 21874856256. Its totient is φ = 21630312000.

The previous prime is 21752451041. The next prime is 21752451059. The reversal of 21752451053 is 35015425712.

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

It is a cyclic number.

It is not a de Polignac number, because 21752451053 - 2²⁴ = 21735673837 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 (21752451059) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 98528 + ... + 230678.

It is an arithmetic number, because the mean of its divisors is an integer number (2734357032).

Almost surely, 2^21752451053 is an apocalyptic number.

It is an amenable number.

21752451053 is a deficient number, since it is larger than the sum of its proper divisors (122405203).

21752451053 is a wasteful number, since it uses less digits than its factorization.

21752451053 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 133075.

The product of its (nonzero) digits is 42000, while the sum is 35.

Adding to 21752451053 its reverse (35015425712), we get a palindrome (56767876765).

The spelling of 21752451053 in words is "twenty-one billion, seven hundred fifty-two million, four hundred fifty-one thousand, fifty-three".