20398258416 has 80 divisors (see below), whose sum is σ = 54824173568. Its totient is φ = 6528211200.

The previous prime is 20398258379. The next prime is 20398258421. The reversal of 20398258416 is 61485289302.

It is a Harshad number since it is a multiple of its sum of digits (48).

It is a congruent number.

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, 135006 + ... + 242946.

Almost surely, 2^20398258416 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 20398258416, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (27412086784).

20398258416 is an abundant number, since it is smaller than the sum of its proper divisors (34425915152).

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

20398258416 is a wasteful number, since it uses less digits than its factorization.

20398258416 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 108110 (or 108104 counting only the distinct ones).

The product of its (nonzero) digits is 829440, while the sum is 48.

The spelling of 20398258416 in words is "twenty billion, three hundred ninety-eight million, two hundred fifty-eight thousand, four hundred sixteen".