20098431 has 12 divisors (see below), whose sum is σ = 29086408. Its totient is φ = 13373424.

The previous prime is 20098417. The next prime is 20098439. The reversal of 20098431 is 13489002.

It is not a de Polignac number, because 20098431 - 2⁵ = 20098399 is a prime.

It is a super-2 number, since 2×20098431² = 807893857323522, which contains 22 as substring.

It is a Duffinian number.

It is a junction number, because it is equal to n+sod(n) for n = 20098395 and 20098404.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (20098439) by changing a digit.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 3696 + ... + 7338.

Almost surely, 2^20098431 is an apocalyptic number.

20098431 is a deficient number, since it is larger than the sum of its proper divisors (8987977).

20098431 is a wasteful number, since it uses less digits than its factorization.

20098431 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 4262 (or 4259 counting only the distinct ones).

The product of its (nonzero) digits is 1728, while the sum is 27.

The square root of 20098431 is about 4483.1273682553. The cubic root of 20098431 is about 271.8863378546.

It can be divided in two parts, 2009 and 8431, that added together give a triangular number (10440 = T₁₄₄).

The spelling of 20098431 in words is "twenty million, ninety-eight thousand, four hundred thirty-one".