20431433 has 12 divisors (see below), whose sum is σ = 23680752. Its totient is φ = 17478720.

The previous prime is 20431427. The next prime is 20431451. The reversal of 20431433 is 33413402.

It is not a de Polignac number, because 20431433 - 2¹⁰ = 20430409 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (20431423) by changing a digit.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 35 + ... + 6392.

It is an arithmetic number, because the mean of its divisors is an integer number (1973396).

Almost surely, 2^20431433 is an apocalyptic number.

It is an amenable number.

20431433 is a deficient number, since it is larger than the sum of its proper divisors (3249319).

20431433 is a wasteful number, since it uses less digits than its factorization.

20431433 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 6472 (or 6455 counting only the distinct ones).

The product of its (nonzero) digits is 864, while the sum is 20.

The square root of 20431433 is about 4520.1142684671. The cubic root of 20431433 is about 273.3797084047.

Adding to 20431433 its reverse (33413402), we get a palindrome (53844835).

The spelling of 20431433 in words is "twenty million, four hundred thirty-one thousand, four hundred thirty-three".