20432691 has 24 divisors (see below), whose sum is σ = 31646160. Its totient is φ = 12658176.

The previous prime is 20432683. The next prime is 20432701. The reversal of 20432691 is 19623402.

It is not a de Polignac number, because 20432691 - 2³ = 20432683 is a prime.

It is not an unprimeable number, because it can be changed into a prime (20432681) by changing a digit.

It is a polite number, since it can be written in 23 ways as a sum of consecutive naturals, for example, 11895 + ... + 13503.

It is an arithmetic number, because the mean of its divisors is an integer number (1318590).

Almost surely, 2^20432691 is an apocalyptic number.

20432691 is a deficient number, since it is larger than the sum of its proper divisors (11213469).

20432691 is a wasteful number, since it uses less digits than its factorization.

20432691 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1715 (or 1712 counting only the distinct ones).

The product of its (nonzero) digits is 2592, while the sum is 27.

The square root of 20432691 is about 4520.2534220993. The cubic root of 20432691 is about 273.3853191160.

The spelling of 20432691 in words is "twenty million, four hundred thirty-two thousand, six hundred ninety-one".