20451602949903 has 6 divisors (see below), whose sum is σ = 29541204260984. Its totient is φ = 13634401966596.

The previous prime is 20451602949893. The next prime is 20451602949913. The reversal of 20451602949903 is 30994920615402.

20451602949903 is a `hidden beast` number, since 2 + 0 + 451 + 60 + 2 + 9 + 49 + 90 + 3 = 666.

It is an interprime number because it is at equal distance from previous prime (20451602949893) and next prime (20451602949913).

It is not a de Polignac number, because 20451602949903 - 2²⁸ = 20451334514447 is a prime.

It is a Duffinian number.

It is a self number, because there is not a number n which added to its sum of digits gives 20451602949903.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (20451602949913) by changing a digit.

It is a polite number, since it can be written in 5 ways as a sum of consecutive naturals, for example, 1136200163875 + ... + 1136200163892.

Almost surely, 2^{20451602949903} is an apocalyptic number.

20451602949903 is a deficient number, since it is larger than the sum of its proper divisors (9089601311081).

20451602949903 is a wasteful number, since it uses less digits than its factorization.

20451602949903 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 2272400327773 (or 2272400327770 counting only the distinct ones).

The product of its (nonzero) digits is 4199040, while the sum is 54.

The spelling of 20451602949903 in words is "twenty trillion, four hundred fifty-one billion, six hundred two million, nine hundred forty-nine thousand, nine hundred three".