20774163736 has 8 divisors (see below), whose sum is σ = 38951557020. Its totient is φ = 10387081864.

The previous prime is 20774163731. The next prime is 20774163749. The reversal of 20774163736 is 63736147702.

It is a tau number, because it is divible by the number of its divisors (8).

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (20774163731) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 1298385226 + ... + 1298385241.

Almost surely, 2^20774163736 is an apocalyptic number.

It is an amenable number.

20774163736 is a deficient number, since it is larger than the sum of its proper divisors (18177393284).

20774163736 is a wasteful number, since it uses less digits than its factorization.

20774163736 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 2596770473 (or 2596770469 counting only the distinct ones).

The product of its (nonzero) digits is 889056, while the sum is 46.

The spelling of 20774163736 in words is "twenty billion, seven hundred seventy-four million, one hundred sixty-three thousand, seven hundred thirty-six".