21926641782 has 16 divisors (see below), whose sum is σ = 46161351360. Its totient is φ = 6924202632.

The previous prime is 21926641777. The next prime is 21926641787. The reversal of 21926641782 is 28714662912.

It is an interprime number because it is at equal distance from previous prime (21926641777) and next prime (21926641787).

It is a super-2 number, since 2×21926641782² (a number of 21 digits) contains 22 as substring.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (21926641787) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 96169368 + ... + 96169595.

It is an arithmetic number, because the mean of its divisors is an integer number (2885084460).

Almost surely, 2^21926641782 is an apocalyptic number.

21926641782 is an abundant number, since it is smaller than the sum of its proper divisors (24234709578).

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

21926641782 is a wasteful number, since it uses less digits than its factorization.

21926641782 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 192338987.

The product of its digits is 580608, while the sum is 48.

The spelling of 21926641782 in words is "twenty-one billion, nine hundred twenty-six million, six hundred forty-one thousand, seven hundred eighty-two".