20134540 has 24 divisors (see below), whose sum is σ = 42411600. Its totient is φ = 8029248.

The previous prime is 20134529. The next prime is 20134553. The reversal of 20134540 is 4543102.

It is an unprimeable number.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 6111 + ... + 8809.

It is an arithmetic number, because the mean of its divisors is an integer number (1767150).

Almost surely, 2^20134540 is an apocalyptic number.

20134540 is a gapful number since it is divisible by the number (20) formed by its first and last digit.

It is an amenable number.

20134540 is an abundant number, since it is smaller than the sum of its proper divisors (22277060).

It is a pseudoperfect number, because it is the sum of a subset of its proper divisors.

20134540 is a wasteful number, since it uses less digits than its factorization.

20134540 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 3081 (or 3079 counting only the distinct ones).

The product of its (nonzero) digits is 480, while the sum is 19.

The square root of 20134540 is about 4487.1527720816. The cubic root of 20134540 is about 272.0490648225.

Adding to 20134540 its reverse (4543102), we get a palindrome (24677642).

The spelling of 20134540 in words is "twenty million, one hundred thirty-four thousand, five hundred forty".