20402232 has 16 divisors (see below), whose sum is σ = 51005640. Its totient is φ = 6800736.

The previous prime is 20402231. The next prime is 20402233. The reversal of 20402232 is 23220402.

It is an interprime number because it is at equal distance from previous prime (20402231) and next prime (20402233).

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (20402231) 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 3 ways as a sum of consecutive naturals, for example, 425023 + ... + 425070.

Almost surely, 2^20402232 is an apocalyptic number.

It is an amenable number.

20402232 is an abundant number, since it is smaller than the sum of its proper divisors (30603408).

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

20402232 is a wasteful number, since it uses less digits than its factorization.

20402232 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 850102 (or 850098 counting only the distinct ones).

The product of its (nonzero) digits is 192, while the sum is 15.

The square root of 20402232 is about 4516.8829960494. The cubic root of 20402232 is about 273.2494064492.

Adding to 20402232 its reverse (23220402), we get a palindrome (43622634).

The spelling of 20402232 in words is "twenty million, four hundred two thousand, two hundred thirty-two".