20263275512644 has 48 divisors (see below), whose sum is σ = 37490664628480. Its totient is φ = 9556379585280.

The previous prime is 20263275512629. The next prime is 20263275512651. The reversal of 20263275512644 is 44621557236202.

It is a super-2 number, since 2×20263275512644² (a number of 27 digits) contains 22 as substring.

It is an unprimeable number.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 29587432 + ... + 30264544.

Almost surely, 2^{20263275512644} is an apocalyptic number.

It is an amenable number.

20263275512644 is a deficient number, since it is larger than the sum of its proper divisors (17227389115836).

20263275512644 is a wasteful number, since it uses less digits than its factorization.

20263275512644 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 678860 (or 678858 counting only the distinct ones).

The product of its (nonzero) digits is 4838400, while the sum is 49.

The spelling of 20263275512644 in words is "twenty trillion, two hundred sixty-three billion, two hundred seventy-five million, five hundred twelve thousand, six hundred forty-four".