31836810872 has 8 divisors (see below), whose sum is σ = 59694020400. Its totient is φ = 15918405432.

The previous prime is 31836810871. The next prime is 31836810947. The reversal of 31836810872 is 27801863813.

It is a happy number.

It is a tau number, because it is divible by the number of its divisors (8).

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (31836810871) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 1989800672 + ... + 1989800687.

It is an arithmetic number, because the mean of its divisors is an integer number (7461752550).

Almost surely, 2^31836810872 is an apocalyptic number.

It is an amenable number.

31836810872 is a deficient number, since it is larger than the sum of its proper divisors (27857209528).

31836810872 is a wasteful number, since it uses less digits than its factorization.

31836810872 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 3979601365 (or 3979601361 counting only the distinct ones).

The product of its (nonzero) digits is 387072, while the sum is 47.

The spelling of 31836810872 in words is "thirty-one billion, eight hundred thirty-six million, eight hundred ten thousand, eight hundred seventy-two".