20146993902 has 96 divisors (see below), whose sum is σ = 50523782400. Its totient is φ = 5683100544.

The previous prime is 20146993877. The next prime is 20146993903. The reversal of 20146993902 is 20939964102.

It is a happy number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (20146993903) by changing a digit.

It is a polite number, since it can be written in 47 ways as a sum of consecutive naturals, for example, 14117713 + ... + 14119139.

It is an arithmetic number, because the mean of its divisors is an integer number (526289400).

Almost surely, 2^20146993902 is an apocalyptic number.

It is a practical number, because each smaller number is the sum of distinct divisors of 20146993902, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (25261891200).

20146993902 is an abundant number, since it is smaller than the sum of its proper divisors (30376788498).

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

20146993902 is a wasteful number, since it uses less digits than its factorization.

20146993902 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 2790 (or 2787 counting only the distinct ones).

The product of its (nonzero) digits is 209952, while the sum is 45.

The spelling of 20146993902 in words is "twenty billion, one hundred forty-six million, nine hundred ninety-three thousand, nine hundred two".