20746577943 has 24 divisors (see below), whose sum is σ = 36882806688. Its totient is φ = 10943249472.

The previous prime is 20746577911. The next prime is 20746577953. The reversal of 20746577943 is 34977564702.

20746577943 is a `hidden beast` number, since 20 + 7 + 4 + 6 + 577 + 9 + 43 = 666.

It is not a de Polignac number, because 20746577943 - 2⁵ = 20746577911 is a prime.

It is a super-2 number, since 2×20746577943² (a number of 21 digits) contains 22 as substring.

It is a self number, because there is not a number n which added to its sum of digits gives 20746577943.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (20746577953) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 23 ways as a sum of consecutive naturals, for example, 12664980 + ... + 12666617.

It is an arithmetic number, because the mean of its divisors is an integer number (1536783612).

Almost surely, 2^20746577943 is an apocalyptic number.

20746577943 is a deficient number, since it is larger than the sum of its proper divisors (16136228745).

20746577943 is a wasteful number, since it uses less digits than its factorization.

20746577943 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 25331623 (or 25331620 counting only the distinct ones).

The product of its (nonzero) digits is 8890560, while the sum is 54.

The spelling of 20746577943 in words is "twenty billion, seven hundred forty-six million, five hundred seventy-seven thousand, nine hundred forty-three".