20554402 has 8 divisors (see below), whose sum is σ = 33634512. Its totient is φ = 9342900.

The previous prime is 20554393. The next prime is 20554421. The reversal of 20554402 is 20445502.

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

It is a Harshad number since it is a multiple of its sum of digits (22), and also a Moran number because the ratio is a prime number: 934291 = 20554402 / (2 + 0 + 5 + 5 + 4 + 4 + 0 + 2).

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (11) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 467124 + ... + 467167.

It is an arithmetic number, because the mean of its divisors is an integer number (4204314).

Almost surely, 2^20554402 is an apocalyptic number.

20554402 is a gapful number since it is divisible by the number (22) formed by its first and last digit.

20554402 is a deficient number, since it is larger than the sum of its proper divisors (13080110).

20554402 is a wasteful number, since it uses less digits than its factorization.

20554402 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 934304.

The product of its (nonzero) digits is 1600, while the sum is 22.

The square root of 20554402 is about 4533.6962844902. The cubic root of 20554402 is about 273.9270678072.

Adding to 20554402 its reverse (20445502), we get a palindrome (40999904).

Subtracting from 20554402 its reverse (20445502), we obtain a square (108900 = 330²).

The spelling of 20554402 in words is "twenty million, five hundred fifty-four thousand, four hundred two".