20000399376 has 80 divisors (see below), whose sum is σ = 53803877760. Its totient is φ = 6394214400.

The previous prime is 20000399333. The next prime is 20000399383. The reversal of 20000399376 is 67399300002.

It is an unprimeable number.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 162616 + ... + 257768.

It is an arithmetic number, because the mean of its divisors is an integer number (672548472).

Almost surely, 2^20000399376 is an apocalyptic number.

It is an amenable number.

It is a practical number, because each smaller number is the sum of distinct divisors of 20000399376, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (26901938880).

20000399376 is an abundant number, since it is smaller than the sum of its proper divisors (33803478384).

It is a pseudoperfect number, because it is the sum of a subset of its proper divisors.

20000399376 is a wasteful number, since it uses less digits than its factorization.

20000399376 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 95344 (or 95338 counting only the distinct ones).

The product of its (nonzero) digits is 61236, while the sum is 39.

Adding to 20000399376 its reverse (67399300002), we get a palindrome (87399699378).

The spelling of 20000399376 in words is "twenty billion, three hundred ninety-nine thousand, three hundred seventy-six".