20764015351 has 4 divisors (see below), whose sum is σ = 20765230632. Its totient is φ = 20762800072.

The previous prime is 20764015343. The next prime is 20764015361. The reversal of 20764015351 is 15351046702.

It is a semiprime because it is the product of two primes.

It is a cyclic number.

It is not a de Polignac number, because 20764015351 - 2³ = 20764015343 is a prime.

It is a super-2 number, since 2×20764015351² (a number of 21 digits) contains 22 as substring.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (20764015301) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 581641 + ... + 616306.

It is an arithmetic number, because the mean of its divisors is an integer number (5191307658).

Almost surely, 2^20764015351 is an apocalyptic number.

20764015351 is a deficient number, since it is larger than the sum of its proper divisors (1215281).

20764015351 is a wasteful number, since it uses less digits than its factorization.

20764015351 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1215280.

The product of its (nonzero) digits is 25200, while the sum is 34.

The spelling of 20764015351 in words is "twenty billion, seven hundred sixty-four million, fifteen thousand, three hundred fifty-one".