20757478395 has 16 divisors (see below), whose sum is σ = 33231018240. Its totient is φ = 11064304224.

The previous prime is 20757478361. The next prime is 20757478411. The reversal of 20757478395 is 59387475702.

It is not a de Polignac number, because 20757478395 - 2¹⁹ = 20756954107 is a prime.

It is an unprimeable number.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 369855 + ... + 422264.

It is an arithmetic number, because the mean of its divisors is an integer number (2076938640).

Almost surely, 2^20757478395 is an apocalyptic number.

20757478395 is a deficient number, since it is larger than the sum of its proper divisors (12473539845).

20757478395 is a wasteful number, since it uses less digits than its factorization.

20757478395 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 793874.

The product of its (nonzero) digits is 14817600, while the sum is 57.

The spelling of 20757478395 in words is "twenty billion, seven hundred fifty-seven million, four hundred seventy-eight thousand, three hundred ninety-five".