22651943887 has 6 divisors (see below), whose sum is σ = 23906899608. Its totient is φ = 21459735972.

The previous prime is 22651943837. The next prime is 22651943971. The reversal of 22651943887 is 78834915622.

It is a de Polignac number, because none of the positive numbers 2^k-22651943887 is a prime.

It is a super-2 number, since 2×22651943887² (a number of 22 digits) contains 22 as substring.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (22651943827) 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 5 ways as a sum of consecutive naturals, for example, 31373523 + ... + 31374244.

It is an arithmetic number, because the mean of its divisors is an integer number (3984483268).

Almost surely, 2^22651943887 is an apocalyptic number.

22651943887 is a deficient number, since it is larger than the sum of its proper divisors (1254955721).

22651943887 is an equidigital number, since it uses as much as digits as its factorization.

22651943887 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 62747805 (or 62747786 counting only the distinct ones).

The product of its digits is 5806080, while the sum is 55.

The spelling of 22651943887 in words is "twenty-two billion, six hundred fifty-one million, nine hundred forty-three thousand, eight hundred eighty-seven".