18920929461 has 32 divisors (see below), whose sum is σ = 30107688960. Its totient is φ = 10334231424.

The previous prime is 18920929459. The next prime is 18920929471. The reversal of 18920929461 is 16492902981.

It is not a de Polignac number, because 18920929461 - 2¹ = 18920929459 is a prime.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (18920929451) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written in 31 ways as a sum of consecutive naturals, for example, 673545 + ... + 701073.

It is an arithmetic number, because the mean of its divisors is an integer number (940865280).

Almost surely, 2^18920929461 is an apocalyptic number.

It is an amenable number.

18920929461 is a deficient number, since it is larger than the sum of its proper divisors (11186759499).

18920929461 is a wasteful number, since it uses less digits than its factorization.

18920929461 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 28985.

The product of its (nonzero) digits is 559872, while the sum is 51.

The spelling of 18920929461 in words is "eighteen billion, nine hundred twenty million, nine hundred twenty-nine thousand, four hundred sixty-one".