22038696422521 has 27 divisors (see below), whose sum is σ = 23390409427749. Its totient is φ = 20762068181400.

The previous prime is 22038696422473. The next prime is 22038696422531. The reversal of 22038696422521 is 12522469683022.

The square root of 22038696422521 is 4694539.

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

It is a de Polignac number, because none of the positive numbers 2^k-22038696422521 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (22038696422531) by changing a digit.

It is a polite number, since it can be written in 26 ways as a sum of consecutive naturals, for example, 18820406266 + ... + 18820407436.

It is an arithmetic number, because the mean of its divisors is an integer number (866311460287).

Almost surely, 2^{22038696422521} is an apocalyptic number.

22038696422521 is the 4694539-th square number.

22038696422521 is the 2347270-th centered octagonal number.

It is an amenable number.

22038696422521 is a deficient number, since it is larger than the sum of its proper divisors (1351713005228).

22038696422521 is an frugal number, since it uses more digits than its factorization.

22038696422521 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 2802 (or 1401 counting only the distinct ones).

The product of its (nonzero) digits is 4976640, while the sum is 52.

The spelling of 22038696422521 in words is "twenty-two trillion, thirty-eight billion, six hundred ninety-six million, four hundred twenty-two thousand, five hundred twenty-one".