20416991001 has 16 divisors (see below), whose sum is σ = 29702201088. Its totient is φ = 12371950800.

The previous prime is 20416990999. The next prime is 20416991027. The reversal of 20416991001 is 10019961402.

It is not a de Polignac number, because 20416991001 - 2¹ = 20416990999 is a prime.

It is a Harshad number since it is a multiple of its sum of digits (33).

It is not an unprimeable number, because it can be changed into a prime (20416991501) 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, 174570 + ... + 267036.

It is an arithmetic number, because the mean of its divisors is an integer number (1856387568).

Almost surely, 2^20416991001 is an apocalyptic number.

It is an amenable number.

20416991001 is a deficient number, since it is larger than the sum of its proper divisors (9285210087).

20416991001 is a wasteful number, since it uses less digits than its factorization.

20416991001 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 99172.

The product of its (nonzero) digits is 3888, while the sum is 33.

The spelling of 20416991001 in words is "twenty billion, four hundred sixteen million, nine hundred ninety-one thousand, one".