34187961820 has 48 divisors (see below), whose sum is σ = 73242701280. Its totient is φ = 13400847104.

The previous prime is 34187961791. The next prime is 34187961859. The reversal of 34187961820 is 2816978143.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 328362 + ... + 419758.

It is an arithmetic number, because the mean of its divisors is an integer number (1525889610).

Almost surely, 2^34187961820 is an apocalyptic number.

It is an amenable number.

34187961820 is an abundant number, since it is smaller than the sum of its proper divisors (39054739460).

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

34187961820 is a wasteful number, since it uses less digits than its factorization.

34187961820 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 91782 (or 91780 counting only the distinct ones).

The product of its (nonzero) digits is 580608, while the sum is 49.

The spelling of 34187961820 in words is "thirty-four billion, one hundred eighty-seven million, nine hundred sixty-one thousand, eight hundred twenty".