20101840398 has 12 divisors (see below), whose sum is σ = 43553987568. Its totient is φ = 6700613460.

The previous prime is 20101840393. The next prime is 20101840399. The reversal of 20101840398 is 89304810102.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (20101840391) by changing a digit.

It is a polite number, since it can be written in 5 ways as a sum of consecutive naturals, for example, 558384438 + ... + 558384473.

It is an arithmetic number, because the mean of its divisors is an integer number (3629498964).

Almost surely, 2^20101840398 is an apocalyptic number.

20101840398 is an abundant number, since it is smaller than the sum of its proper divisors (23452147170).

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

20101840398 is a wasteful number, since it uses less digits than its factorization.

20101840398 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1116768919 (or 1116768916 counting only the distinct ones).

The product of its (nonzero) digits is 13824, while the sum is 36.

The spelling of 20101840398 in words is "twenty billion, one hundred one million, eight hundred forty thousand, three hundred ninety-eight".