20262639262644 has 18 divisors (see below), whose sum is σ = 51219449247330. Its totient is φ = 6754213087536.

The previous prime is 20262639262637. The next prime is 20262639262661. The reversal of 20262639262644 is 44626293626202.

20262639262644 is a `hidden beast` number, since 2 + 0 + 2 + 6 + 2 + 6 + 3 + 9 + 2 + 626 + 4 + 4 = 666.

It can be written as a sum of positive squares in only one way, i.e., 12911014376100 + 7351624886544 = 3593190^2 + 2711388^2 .

It is a tau number, because it is divible by the number of its divisors (18).

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 5 ways as a sum of consecutive naturals, for example, 281425545279 + ... + 281425545350.

It is an arithmetic number, because the mean of its divisors is an integer number (2845524958185).

Almost surely, 2^{20262639262644} is an apocalyptic number.

It is an amenable number.

20262639262644 is an abundant number, since it is smaller than the sum of its proper divisors (30956809984686).

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

20262639262644 is a wasteful number, since it uses less digits than its factorization.

20262639262644 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 562851090639 (or 562851090634 counting only the distinct ones).

The product of its (nonzero) digits is 17915904, while the sum is 54.

The spelling of 20262639262644 in words is "twenty trillion, two hundred sixty-two billion, six hundred thirty-nine million, two hundred sixty-two thousand, six hundred forty-four".