21469997753 has 8 divisors (see below), whose sum is σ = 21878393760. Its totient is φ = 21063085120.

The previous prime is 21469997723. The next prime is 21469997771. The reversal of 21469997753 is 35779996412.

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 21469997753 - 2²⁶ = 21402888889 is a prime.

It is a super-4 number, since 4×21469997753⁴ (a number of 42 digits) contains 4444 as substring.

It is a Duffinian number.

It is a Curzon number.

It is not an unprimeable number, because it can be changed into a prime (21469997713) 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, 341600 + ... + 399537.

It is an arithmetic number, because the mean of its divisors is an integer number (2734799220).

Almost surely, 2^21469997753 is an apocalyptic number.

It is an amenable number.

21469997753 is a deficient number, since it is larger than the sum of its proper divisors (408396007).

21469997753 is an equidigital number, since it uses as much as digits as its factorization.

21469997753 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 741687.

The product of its digits is 25719120, while the sum is 62.

The spelling of 21469997753 in words is "twenty-one billion, four hundred sixty-nine million, nine hundred ninety-seven thousand, seven hundred fifty-three".