20239554 has 16 divisors (see below), whose sum is σ = 42860448. Its totient is φ = 6349632.

The previous prime is 20239553. The next prime is 20239591. The reversal of 20239554 is 45593202.

It is a super-2 number, since 2×20239554² = 819279092237832, which contains 22 as substring.

It is not an unprimeable number, because it can be changed into a prime (20239553) by changing a digit.

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 7 ways as a sum of consecutive naturals, for example, 99112 + ... + 99315.

It is an arithmetic number, because the mean of its divisors is an integer number (2678778).

Almost surely, 2^20239554 is an apocalyptic number.

20239554 is an abundant number, since it is smaller than the sum of its proper divisors (22620894).

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

20239554 is a wasteful number, since it uses less digits than its factorization.

20239554 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 198449.

The product of its (nonzero) digits is 10800, while the sum is 30.

The square root of 20239554 is about 4498.8391836117. The cubic root of 20239554 is about 272.5212126123.

The spelling of 20239554 in words is "twenty million, two hundred thirty-nine thousand, five hundred fifty-four".