21826761942 has 16 divisors (see below), whose sum is σ = 43905858480. Its totient is φ = 7233531552.

The previous prime is 21826761899. The next prime is 21826761967. The reversal of 21826761942 is 24916762812.

It is a super-2 number, since 2×21826761942² (a number of 21 digits) contains 22 as substring.

It is a junction number, because it is equal to n+sod(n) for n = 21826761891 and 21826761900.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 10512817 + ... + 10514892.

It is an arithmetic number, because the mean of its divisors is an integer number (2744116155).

Almost surely, 2^21826761942 is an apocalyptic number.

21826761942 is an abundant number, since it is smaller than the sum of its proper divisors (22079096538).

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

21826761942 is a wasteful number, since it uses less digits than its factorization.

21826761942 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 21027887.

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

The spelling of 21826761942 in words is "twenty-one billion, eight hundred twenty-six million, seven hundred sixty-one thousand, nine hundred forty-two".