20774933697 has 32 divisors (see below), whose sum is σ = 33334021120. Its totient is φ = 11242929600.

The previous prime is 20774933687. The next prime is 20774933717. The reversal of 20774933697 is 79633947702.

It is a happy number.

It is not a de Polignac number, because 20774933697 - 2⁶ = 20774933633 is a prime.

It is a super-2 number, since 2×20774933697² (a number of 21 digits) contains 22 as substring.

It is a Harshad number since it is a multiple of its sum of digits (57).

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (20774933687) by changing a digit.

It is a polite number, since it can be written in 31 ways as a sum of consecutive naturals, for example, 1609923 + ... + 1622775.

It is an arithmetic number, because the mean of its divisors is an integer number (1041688160).

Almost surely, 2^20774933697 is an apocalyptic number.

It is an amenable number.

20774933697 is a deficient number, since it is larger than the sum of its proper divisors (12559087423).

20774933697 is a wasteful number, since it uses less digits than its factorization.

20774933697 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 16933.

The product of its (nonzero) digits is 12002256, while the sum is 57.

The spelling of 20774933697 in words is "twenty billion, seven hundred seventy-four million, nine hundred thirty-three thousand, six hundred ninety-seven".