21222726147 has 96 divisors (see below), whose sum is σ = 37286645760. Its totient is φ = 11374272000.

The previous prime is 21222726143. The next prime is 21222726149. The reversal of 21222726147 is 74162722212.

21222726147 is a `hidden beast` number, since 2 + 12 + 2 + 27 + 2 + 614 + 7 = 666.

It is not a de Polignac number, because 21222726147 - 2² = 21222726143 is a prime.

It is a super-2 number, since 2×21222726147² (a number of 21 digits) contains 22 as substring.

It is not an unprimeable number, because it can be changed into a prime (21222726143) by changing a digit.

It is a polite number, since it can be written in 95 ways as a sum of consecutive naturals, for example, 23295622 + ... + 23296532.

It is an arithmetic number, because the mean of its divisors is an integer number (388402560).

Almost surely, 2^21222726147 is an apocalyptic number.

21222726147 is a deficient number, since it is larger than the sum of its proper divisors (16063919613).

21222726147 is a wasteful number, since it uses less digits than its factorization.

21222726147 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1305 (or 1302 counting only the distinct ones).

The product of its digits is 37632, while the sum is 36.

The spelling of 21222726147 in words is "twenty-one billion, two hundred twenty-two million, seven hundred twenty-six thousand, one hundred forty-seven".