20021161598 has 32 divisors (see below), whose sum is σ = 31153766400. Its totient is φ = 9643828896.

The previous prime is 20021161597. The next prime is 20021161603. The reversal of 20021161598 is 89516112002.

It is a Curzon number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (20021161597) 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, 7997615 + ... + 8000117.

It is an arithmetic number, because the mean of its divisors is an integer number (973555200).

Almost surely, 2^20021161598 is an apocalyptic number.

20021161598 is a deficient number, since it is larger than the sum of its proper divisors (11132604802).

20021161598 is a wasteful number, since it uses less digits than its factorization.

20021161598 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 3896.

The product of its (nonzero) digits is 8640, while the sum is 35.

The spelling of 20021161598 in words is "twenty billion, twenty-one million, one hundred sixty-one thousand, five hundred ninety-eight".