20903078221037 has 4 divisors (see below), whose sum is σ = 20908128497760. Its totient is φ = 20898027944316.

The previous prime is 20903078221031. The next prime is 20903078221139. The reversal of 20903078221037 is 73012287030902.

It is a semiprime because it is the product of two primes, and also a Blum integer, because the two primes are equal to 3 mod 4.

It is a cyclic number.

It is not a de Polignac number, because 20903078221037 - 2²⁸ = 20902809785581 is a prime.

It is a super-2 number, since 2×20903078221037² (a number of 27 digits) contains 22 as substring.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (20903078221031) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 2525132153 + ... + 2525140430.

It is an arithmetic number, because the mean of its divisors is an integer number (5227032124440).

Almost surely, 2^{20903078221037} is an apocalyptic number.

It is an amenable number.

20903078221037 is a deficient number, since it is larger than the sum of its proper divisors (5050276723).

20903078221037 is an equidigital number, since it uses as much as digits as its factorization.

20903078221037 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 5050276722.

The product of its (nonzero) digits is 254016, while the sum is 44.

The spelling of 20903078221037 in words is "twenty trillion, nine hundred three billion, seventy-eight million, two hundred twenty-one thousand, thirty-seven".