16905238840 has 32 divisors (see below), whose sum is σ = 43470614880. Its totient is φ = 5796081792.

The previous prime is 16905238817. The next prime is 16905238841. The reversal of 16905238840 is 4883250961.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (16905238841) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 30187647 + ... + 30188206.

It is an arithmetic number, because the mean of its divisors is an integer number (1358456715).

Almost surely, 2^16905238840 is an apocalyptic number.

16905238840 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

It is an amenable number.

16905238840 is an abundant number, since it is smaller than the sum of its proper divisors (26565376040).

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

16905238840 is a wasteful number, since it uses less digits than its factorization.

16905238840 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 60375871 (or 60375867 counting only the distinct ones).

The product of its (nonzero) digits is 414720, while the sum is 46.

The spelling of 16905238840 in words is "sixteen billion, nine hundred five million, two hundred thirty-eight thousand, eight hundred forty".