20401232 has 20 divisors (see below), whose sum is σ = 40119456. Its totient is φ = 10047840.

The previous prime is 20401223. The next prime is 20401273. The reversal of 20401232 is 23210402.

It is a congruent number.

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, 8444 + ... + 10587.

Almost surely, 2^20401232 is an apocalyptic number.

It is an amenable number.

20401232 is a deficient number, since it is larger than the sum of its proper divisors (19718224).

20401232 is a wasteful number, since it uses less digits than its factorization.

20401232 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 19106 (or 19100 counting only the distinct ones).

The product of its (nonzero) digits is 96, while the sum is 14.

The square root of 20401232 is about 4516.7722988878. The cubic root of 20401232 is about 273.2449420051.

Adding to 20401232 its reverse (23210402), we get a palindrome (43611634).

The spelling of 20401232 in words is "twenty million, four hundred one thousand, two hundred thirty-two".