20771530744 has 8 divisors (see below), whose sum is σ = 38946620160. Its totient is φ = 10385765368.

The previous prime is 20771530739. The next prime is 20771530757. The reversal of 20771530744 is 44703517702.

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

It is a junction number, because it is equal to n+sod(n) for n = 20771530697 and 20771530706.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 1298220664 + ... + 1298220679.

It is an arithmetic number, because the mean of its divisors is an integer number (4868327520).

Almost surely, 2^20771530744 is an apocalyptic number.

It is an amenable number.

20771530744 is a deficient number, since it is larger than the sum of its proper divisors (18175089416).

20771530744 is a wasteful number, since it uses less digits than its factorization.

20771530744 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 2596441349 (or 2596441345 counting only the distinct ones).

The product of its (nonzero) digits is 164640, while the sum is 40.

The spelling of 20771530744 in words is "twenty billion, seven hundred seventy-one million, five hundred thirty thousand, seven hundred forty-four".