20321512453 has 8 divisors (see below), whose sum is σ = 23335708320. Its totient is φ = 17501780880.

The previous prime is 20321512427. The next prime is 20321512499. The reversal of 20321512453 is 35421512302.

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

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-20321512453 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 (20321512753) 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, 48615850 + ... + 48616267.

It is an arithmetic number, because the mean of its divisors is an integer number (2916963540).

Almost surely, 2^20321512453 is an apocalyptic number.

It is an amenable number.

20321512453 is a deficient number, since it is larger than the sum of its proper divisors (3014195867).

20321512453 is a wasteful number, since it uses less digits than its factorization.

20321512453 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 97232147.

The product of its (nonzero) digits is 7200, while the sum is 28.

The spelling of 20321512453 in words is "twenty billion, three hundred twenty-one million, five hundred twelve thousand, four hundred fifty-three".