20432137 has 8 divisors (see below), whose sum is σ = 22433472. Its totient is φ = 18454800.

The previous prime is 20432123. The next prime is 20432143. The reversal of 20432137 is 73123402.

It is a sphenic number, since it is the product of 3 distinct primes.

It is a cyclic number.

It is not a de Polignac number, because 20432137 - 2²³ = 12043529 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (20432107) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 4189 + ... + 7642.

It is an arithmetic number, because the mean of its divisors is an integer number (2804184).

Almost surely, 2^20432137 is an apocalyptic number.

It is an amenable number.

20432137 is a deficient number, since it is larger than the sum of its proper divisors (2001335).

20432137 is a wasteful number, since it uses less digits than its factorization.

20432137 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 11999.

The product of its (nonzero) digits is 1008, while the sum is 22.

The square root of 20432137 is about 4520.1921419338. The cubic root of 20432137 is about 273.3828482906.

Adding to 20432137 its reverse (73123402), we get a palindrome (93555539).

The spelling of 20432137 in words is "twenty million, four hundred thirty-two thousand, one hundred thirty-seven".