31420780863 has 4 divisors (see below), whose sum is σ = 41894374488. Its totient is φ = 20947187240.

The previous prime is 31420780847. The next prime is 31420780879. The reversal of 31420780863 is 36808702413.

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

It is an interprime number because it is at equal distance from previous prime (31420780847) and next prime (31420780879).

It is a cyclic number.

It is not a de Polignac number, because 31420780863 - 2⁴ = 31420780847 is a prime.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (31420780843) 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, 5236796808 + ... + 5236796813.

It is an arithmetic number, because the mean of its divisors is an integer number (10473593622).

Almost surely, 2^31420780863 is an apocalyptic number.

31420780863 is a deficient number, since it is larger than the sum of its proper divisors (10473593625).

31420780863 is a wasteful number, since it uses less digits than its factorization.

31420780863 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 10473593624.

The product of its (nonzero) digits is 193536, while the sum is 42.

The spelling of 31420780863 in words is "thirty-one billion, four hundred twenty million, seven hundred eighty thousand, eight hundred sixty-three".