20432534 has 8 divisors (see below), whose sum is σ = 31637568. Its totient is φ = 9886680.

The previous prime is 20432527. The next prime is 20432551. The reversal of 20432534 is 43523402.

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

It is a super-2 number, since 2×20432534² = 834976891322312, which contains 22 as substring.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 164717 + ... + 164840.

It is an arithmetic number, because the mean of its divisors is an integer number (3954696).

Almost surely, 2^20432534 is an apocalyptic number.

20432534 is a deficient number, since it is larger than the sum of its proper divisors (11205034).

20432534 is a wasteful number, since it uses less digits than its factorization.

20432534 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 329590.

The product of its (nonzero) digits is 2880, while the sum is 23.

The square root of 20432534 is about 4520.2360557829. The cubic root of 20432534 is about 273.3846189047.

Adding to 20432534 its reverse (43523402), we get a palindrome (63955936).

The spelling of 20432534 in words is "twenty million, four hundred thirty-two thousand, five hundred thirty-four".