20712978903 has 4 divisors (see below), whose sum is σ = 27617305208. Its totient is φ = 13808652600.

The previous prime is 20712978851. The next prime is 20712978967. The reversal of 20712978903 is 30987921702.

It is a semiprime because it is the product of two primes.

It is not a de Polignac number, because 20712978903 - 2¹⁴ = 20712962519 is a prime.

It is a super-2 number, since 2×20712978903² (a number of 21 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 (20712978983) 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, 3452163148 + ... + 3452163153.

It is an arithmetic number, because the mean of its divisors is an integer number (6904326302).

Almost surely, 2^20712978903 is an apocalyptic number.

20712978903 is a deficient number, since it is larger than the sum of its proper divisors (6904326305).

20712978903 is an equidigital number, since it uses as much as digits as its factorization.

20712978903 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 6904326304.

The product of its (nonzero) digits is 381024, while the sum is 48.

The spelling of 20712978903 in words is "twenty billion, seven hundred twelve million, nine hundred seventy-eight thousand, nine hundred three".