20400132 has 24 divisors (see below), whose sum is σ = 47673472. Its totient is φ = 6789600.

The previous prime is 20400101. The next prime is 20400151. The reversal of 20400132 is 23100402.

It is a Harshad number since it is a multiple of its sum of digits (12).

It is an unprimeable number.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 14082 + ... + 15462.

Almost surely, 2^20400132 is an apocalyptic number.

It is an amenable number.

20400132 is an abundant number, since it is smaller than the sum of its proper divisors (27273340).

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

20400132 is a wasteful number, since it uses less digits than its factorization.

20400132 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 2619 (or 2617 counting only the distinct ones).

The product of its (nonzero) digits is 48, while the sum is 12.

The square root of 20400132 is about 4516.6505288765. The cubic root of 20400132 is about 273.2400309481.

Adding to 20400132 its reverse (23100402), we get a palindrome (43500534).

The spelling of 20400132 in words is "twenty million, four hundred thousand, one hundred thirty-two".