21030763253 has 8 divisors (see below), whose sum is σ = 21946632576. Its totient is φ = 20115018000.

The previous prime is 21030763157. The next prime is 21030763261. The reversal of 21030763253 is 35236703012.

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

It is not a de Polignac number, because 21030763253 - 2²⁸ = 20762327797 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 (21030763283) 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, 536543 + ... + 574403.

It is an arithmetic number, because the mean of its divisors is an integer number (2743329072).

Almost surely, 2^21030763253 is an apocalyptic number.

21030763253 is a gapful number since it is divisible by the number (23) formed by its first and last digit.

It is an amenable number.

21030763253 is a deficient number, since it is larger than the sum of its proper divisors (915869323).

21030763253 is a wasteful number, since it uses less digits than its factorization.

21030763253 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 62035.

The product of its (nonzero) digits is 22680, while the sum is 32.

The spelling of 21030763253 in words is "twenty-one billion, thirty million, seven hundred sixty-three thousand, two hundred fifty-three".