16920406354637 has 16 divisors (see below), whose sum is σ = 18701444851200. Its totient is φ = 15238214238720.

The previous prime is 16920406354633. The next prime is 16920406354693. The reversal of 16920406354637 is 73645360402961.

It is a cyclic number.

It is not a de Polignac number, because 16920406354637 - 2² = 16920406354633 is a prime.

It is a super-2 number, since 2×16920406354637² (a number of 27 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 (16920406354633) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 180329687 + ... + 180423492.

It is an arithmetic number, because the mean of its divisors is an integer number (1168840303200).

Almost surely, 2^{16920406354637} is an apocalyptic number.

16920406354637 is a gapful number since it is divisible by the number (17) formed by its first and last digit.

It is an amenable number.

16920406354637 is a deficient number, since it is larger than the sum of its proper divisors (1781038496563).

16920406354637 is a wasteful number, since it uses less digits than its factorization.

16920406354637 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 360753316.

The product of its (nonzero) digits is 19595520, while the sum is 56.

The spelling of 16920406354637 in words is "sixteen trillion, nine hundred twenty billion, four hundred six million, three hundred fifty-four thousand, six hundred thirty-seven".