20406354198 has 32 divisors (see below), whose sum is σ = 42969052800. Its totient is φ = 6442865856.

The previous prime is 20406354173. The next prime is 20406354247. The reversal of 20406354198 is 89145360402.

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, 707365 + ... + 735647.

It is an arithmetic number, because the mean of its divisors is an integer number (1342782900).

Almost surely, 2^20406354198 is an apocalyptic number.

20406354198 is an abundant number, since it is smaller than the sum of its proper divisors (22562698602).

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

20406354198 is a wasteful number, since it uses less digits than its factorization.

20406354198 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 34636.

The product of its (nonzero) digits is 207360, while the sum is 42.

The spelling of 20406354198 in words is "twenty billion, four hundred six million, three hundred fifty-four thousand, one hundred ninety-eight".