20098670640 has 80 divisors (see below), whose sum is σ = 63006012000. Its totient is φ = 5299419136.

The previous prime is 20098670609. The next prime is 20098670659. The reversal of 20098670640 is 4607689002.

It is a tau number, because it is divible by the number of its divisors (80).

It is a super-2 number, since 2×20098670640² (a number of 21 digits) contains 22 as substring.

It is a junction number, because it is equal to n+sod(n) for n = 20098670592 and 20098670601.

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, 449115 + ... + 491834.

It is an arithmetic number, because the mean of its divisors is an integer number (787575150).

Almost surely, 2^20098670640 is an apocalyptic number.

20098670640 is a gapful number since it is divisible by the number (20) formed by its first and last digit.

It is an amenable number.

20098670640 is an abundant number, since it is smaller than the sum of its proper divisors (42907341360).

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

20098670640 is a wasteful number, since it uses less digits than its factorization.

20098670640 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 941054 (or 941048 counting only the distinct ones).

The product of its (nonzero) digits is 145152, while the sum is 42.

The spelling of 20098670640 in words is "twenty billion, ninety-eight million, six hundred seventy thousand, six hundred forty".