20413998 has 32 divisors (see below), whose sum is σ = 49489920. Its totient is φ = 6185880.

The previous prime is 20413997. The next prime is 20414003. The reversal of 20413998 is 89931402.

It is a Smith number, since the sum of its digits (36) coincides with the sum of the digits of its prime factors.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (20413997) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 16590 + ... + 17777.

It is an arithmetic number, because the mean of its divisors is an integer number (1546560).

Almost surely, 2^20413998 is an apocalyptic number.

20413998 is an abundant number, since it is smaller than the sum of its proper divisors (29075922).

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

20413998 is a wasteful number, since it uses less digits than its factorization.

20413998 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 34389 (or 34383 counting only the distinct ones).

The product of its (nonzero) digits is 15552, while the sum is 36.

The square root of 20413998 is about 4518.1852551661. The cubic root of 20413998 is about 273.3019241455.

The spelling of 20413998 in words is "twenty million, four hundred thirteen thousand, nine hundred ninety-eight".