20400098 has 8 divisors (see below), whose sum is σ = 31427292. Its totient is φ = 9924336.

The previous prime is 20400089. The next prime is 20400101. The reversal of 20400098 is 89000402.

It can be written as a sum of positive squares in 2 ways, for example, as 19070689 + 1329409 = 4367^2 + 1153^2 .

It is a sphenic number, since it is the product of 3 distinct primes.

It is an unprimeable number.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 137765 + ... + 137912.

Almost surely, 2^20400098 is an apocalyptic number.

20400098 is a deficient number, since it is larger than the sum of its proper divisors (11027194).

20400098 is a wasteful number, since it uses less digits than its factorization.

20400098 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 275716.

The product of its (nonzero) digits is 576, while the sum is 23.

The square root of 20400098 is about 4516.6467650238. The cubic root of 20400098 is about 273.2398791490.

The spelling of 20400098 in words is "twenty million, four hundred thousand, ninety-eight".