20143432 has 8 divisors (see below), whose sum is σ = 37768950. Its totient is φ = 10071712.

The previous prime is 20143427. The next prime is 20143441. The reversal of 20143432 is 23434102.

It can be written as a sum of positive squares in only one way, i.e., 16924996 + 3218436 = 4114^2 + 1794^2 .

It is a tau number, because it is divible by the number of its divisors (8).

It is an unprimeable number.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 1258957 + ... + 1258972.

Almost surely, 2^20143432 is an apocalyptic number.

It is an amenable number.

20143432 is a deficient number, since it is larger than the sum of its proper divisors (17625518).

20143432 is a wasteful number, since it uses less digits than its factorization.

20143432 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 2517935 (or 2517931 counting only the distinct ones).

The product of its (nonzero) digits is 576, while the sum is 19.

The square root of 20143432 is about 4488.1434914673. The cubic root of 20143432 is about 272.0891071951.

Adding to 20143432 its reverse (23434102), we get a palindrome (43577534).

The spelling of 20143432 in words is "twenty million, one hundred forty-three thousand, four hundred thirty-two".