20826972357 has 8 divisors (see below), whose sum is σ = 29402784576. Its totient is φ = 13067904192.

The previous prime is 20826972281. The next prime is 20826972377. The reversal of 20826972357 is 75327962802.

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

It is not a de Polignac number, because 20826972357 - 2¹⁸ = 20826710213 is a prime.

It is a Harshad number since it is a multiple of its sum of digits (51), and also a Moran number because the ratio is a prime number: 408372007 = 20826972357 / (2 + 0 + 8 + 2 + 6 + 9 + 7 + 2 + 3 + 5 + 7).

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (20826972377) 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, 204185953 + ... + 204186054.

It is an arithmetic number, because the mean of its divisors is an integer number (3675348072).

Almost surely, 2^20826972357 is an apocalyptic number.

It is an amenable number.

20826972357 is a deficient number, since it is larger than the sum of its proper divisors (8575812219).

20826972357 is a wasteful number, since it uses less digits than its factorization.

20826972357 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 408372027.

The product of its (nonzero) digits is 2540160, while the sum is 51.

The spelling of 20826972357 in words is "twenty billion, eight hundred twenty-six million, nine hundred seventy-two thousand, three hundred fifty-seven".