22437343681 has 3 divisors (see below), whose sum is σ = 22437493473. Its totient is φ = 22437193890.

The previous prime is 22437343673. The next prime is 22437343697. The reversal of 22437343681 is 18634373422.

The square root of 22437343681 is 149791.

It is a perfect power (a square), and thus also a powerful number.

It is a semiprime because it is the product of two primes, and also a brilliant number, because the two primes have the same length.

It is not a de Polignac number, because 22437343681 - 2³ = 22437343673 is a prime.

It is a super-2 number, since 2×22437343681² (a number of 22 digits) contains 22 as substring.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (22437343381) by changing a digit.

It is a polite number, since it can be written in 2 ways as a sum of consecutive naturals, for example, 74896 + ... + 224686.

It is an arithmetic number, because the mean of its divisors is an integer number (7479164491).

Almost surely, 2^22437343681 is an apocalyptic number.

22437343681 is the 149791-st square number.

22437343681 is the 74896-th centered octagonal number.

It is an amenable number.

22437343681 is a deficient number, since it is larger than the sum of its proper divisors (149792).

22437343681 is an frugal number, since it uses more digits than its factorization.

22437343681 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 299582 (or 149791 counting only the distinct ones).

The product of its digits is 580608, while the sum is 43.

The spelling of 22437343681 in words is "twenty-two billion, four hundred thirty-seven million, three hundred forty-three thousand, six hundred eighty-one".