21793703902254 has 32 divisors (see below), whose sum is σ = 48883074186240. Its totient is φ = 7196674806936.

The previous prime is 21793703902237. The next prime is 21793703902261. The reversal of 21793703902254 is 45220930739712.

21793703902254 is a `hidden beast` number, since 2 + 17 + 9 + 370 + 3 + 9 + 0 + 2 + 254 = 666.

It is a Harshad number since it is a multiple of its sum of digits (54).

It is a Curzon number.

It is a self number, because there is not a number n which added to its sum of digits gives 21793703902254.

It is a congruent number.

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, 1885915294 + ... + 1885926849.

It is an arithmetic number, because the mean of its divisors is an integer number (1527596068320).

Almost surely, 2^{21793703902254} is an apocalyptic number.

21793703902254 is an abundant number, since it is smaller than the sum of its proper divisors (27089370283986).

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

21793703902254 is a wasteful number, since it uses less digits than its factorization.

21793703902254 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 3771842261 (or 3771842255 counting only the distinct ones).

The product of its (nonzero) digits is 5715360, while the sum is 54.

The spelling of 21793703902254 in words is "twenty-one trillion, seven hundred ninety-three billion, seven hundred three million, nine hundred two thousand, two hundred fifty-four".