21972089151 has 24 divisors (see below), whose sum is σ = 32081837424. Its totient is φ = 14489280000.

The previous prime is 21972089141. The next prime is 21972089177. The reversal of 21972089151 is 15198027912.

It is not a de Polignac number, because 21972089151 - 2⁹ = 21972088639 is a prime.

It is a junction number, because it is equal to n+sod(n) for n = 21972089097 and 21972089106.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (21972089141) by changing a digit.

It is a polite number, since it can be written in 23 ways as a sum of consecutive naturals, for example, 1947276 + ... + 1958526.

It is an arithmetic number, because the mean of its divisors is an integer number (1336743226).

Almost surely, 2^21972089151 is an apocalyptic number.

21972089151 is a deficient number, since it is larger than the sum of its proper divisors (10109748273).

21972089151 is a wasteful number, since it uses less digits than its factorization.

21972089151 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 13591 (or 13588 counting only the distinct ones).

The product of its (nonzero) digits is 90720, while the sum is 45.

The spelling of 21972089151 in words is "twenty-one billion, nine hundred seventy-two million, eighty-nine thousand, one hundred fifty-one".