20954756446 has 16 divisors (see below), whose sum is σ = 33905237184. Its totient is φ = 9655641504.

The previous prime is 20954756437. The next prime is 20954756467. The reversal of 20954756446 is 64465745902.

It is a super-2 number, since 2×20954756446² (a number of 21 digits) contains 22 as substring.

It is a junction number, because it is equal to n+sod(n) for n = 20954756393 and 20954756402.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 641446 + ... + 673321.

It is an arithmetic number, because the mean of its divisors is an integer number (2119077324).

Almost surely, 2^20954756446 is an apocalyptic number.

20954756446 is a gapful number since it is divisible by the number (26) formed by its first and last digit.

20954756446 is a deficient number, since it is larger than the sum of its proper divisors (12950480738).

20954756446 is a wasteful number, since it uses less digits than its factorization.

20954756446 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1315395.

The product of its (nonzero) digits is 7257600, while the sum is 52.

The spelling of 20954756446 in words is "twenty billion, nine hundred fifty-four million, seven hundred fifty-six thousand, four hundred forty-six".