21954272967 has 40 divisors (see below), whose sum is σ = 36146314512. Its totient is φ = 13168396800.

The previous prime is 21954272953. The next prime is 21954272971. The reversal of 21954272967 is 76927245912.

21954272967 is a `hidden beast` number, since 2 + 1 + 9 + 542 + 7 + 2 + 96 + 7 = 666.

It is not a de Polignac number, because 21954272967 - 2⁶ = 21954272903 is a prime.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (21954272917) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written in 39 ways as a sum of consecutive naturals, for example, 40584 + ... + 213437.

Almost surely, 2^21954272967 is an apocalyptic number.

21954272967 is a gapful number since it is divisible by the number (27) formed by its first and last digit.

21954272967 is a deficient number, since it is larger than the sum of its proper divisors (14192041545).

21954272967 is a wasteful number, since it uses less digits than its factorization.

21954272967 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 254141 (or 254132 counting only the distinct ones).

The product of its digits is 3810240, while the sum is 54.

The spelling of 21954272967 in words is "twenty-one billion, nine hundred fifty-four million, two hundred seventy-two thousand, nine hundred sixty-seven".