20954082128 has 40 divisors (see below), whose sum is σ = 47652342912. Its totient is φ = 8737607808.

The previous prime is 20954082077. The next prime is 20954082131. The reversal of 20954082128 is 82128045902.

It is a happy number.

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, 2524100 + ... + 2532387.

Almost surely, 2^20954082128 is an apocalyptic number.

20954082128 is a gapful number since it is divisible by the number (28) formed by its first and last digit.

It is an amenable number.

20954082128 is an abundant number, since it is smaller than the sum of its proper divisors (26698260784).

It is a pseudoperfect number, because it is the sum of a subset of its proper divisors.

20954082128 is a wasteful number, since it uses less digits than its factorization.

20954082128 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 5056539 (or 5056533 counting only the distinct ones).

The product of its (nonzero) digits is 92160, while the sum is 41.

The spelling of 20954082128 in words is "twenty billion, nine hundred fifty-four million, eighty-two thousand, one hundred twenty-eight".