20903990259042 has 64 divisors (see below), whose sum is σ = 53657301225600. Its totient is φ = 5961922352640.

The previous prime is 20903990258993. The next prime is 20903990259067. The reversal of 20903990259042 is 24095209930902.

It is a happy number.

20903990259042 is a `hidden beast` number, since 2 + 0 + 9 + 0 + 3 + 9 + 9 + 0 + 2 + 590 + 42 = 666.

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

It is a self number, because there is not a number n which added to its sum of digits gives 20903990259042.

It is an unprimeable number.

It is a polite number, since it can be written in 31 ways as a sum of consecutive naturals, for example, 1035045867 + ... + 1035066062.

It is an arithmetic number, because the mean of its divisors is an integer number (838395331650).

Almost surely, 2^{20903990259042} is an apocalyptic number.

20903990259042 is a gapful number since it is divisible by the number (22) formed by its first and last digit.

20903990259042 is an abundant number, since it is smaller than the sum of its proper divisors (32753310966558).

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

20903990259042 is a wasteful number, since it uses less digits than its factorization.

20903990259042 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 2070111968 (or 2070111962 counting only the distinct ones).

The product of its (nonzero) digits is 3149280, while the sum is 54.

The spelling of 20903990259042 in words is "twenty trillion, nine hundred three billion, nine hundred ninety million, two hundred fifty-nine thousand, forty-two".