2101620399 has 8 divisors (see below), whose sum is σ = 2867327232. Its totient is φ = 1368496920.

The previous prime is 2101620397. The next prime is 2101620467. The reversal of 2101620399 is 9930261012.

It is a sphenic number, since it is the product of 3 distinct primes.

It is not a de Polignac number, because 2101620399 - 2¹ = 2101620397 is a prime.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (2101620397) 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, 8145687 + ... + 8145944.

It is an arithmetic number, because the mean of its divisors is an integer number (358415904).

Almost surely, 2^2101620399 is an apocalyptic number.

2101620399 is a deficient number, since it is larger than the sum of its proper divisors (765706833).

2101620399 is a wasteful number, since it uses less digits than its factorization.

2101620399 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 16291677.

The product of its (nonzero) digits is 5832, while the sum is 33.

The square root of 2101620399 is about 45843.4335428750. The cubic root of 2101620399 is about 1280.9084531957.

The spelling of 2101620399 in words is "two billion, one hundred one million, six hundred twenty thousand, three hundred ninety-nine".