20131534 has 8 divisors (see below), whose sum is σ = 30294720. Its totient is φ = 10033296.

The previous prime is 20131523. The next prime is 20131541. The reversal of 20131534 is 43513102.

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

It is a super-2 number, since 2×20131534² = 810557322386312, 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, 15454 + ... + 16705.

It is an arithmetic number, because the mean of its divisors is an integer number (3786840).

Almost surely, 2^20131534 is an apocalyptic number.

20131534 is a deficient number, since it is larger than the sum of its proper divisors (10163186).

20131534 is a wasteful number, since it uses less digits than its factorization.

20131534 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 32474.

The product of its (nonzero) digits is 360, while the sum is 19.

The square root of 20131534 is about 4486.8178032989. The cubic root of 20131534 is about 272.0355255646.

Adding to 20131534 its reverse (43513102), we get a palindrome (63644636).

The spelling of 20131534 in words is "twenty million, one hundred thirty-one thousand, five hundred thirty-four".