20125534 has 24 divisors (see below), whose sum is σ = 35667432. Its totient is φ = 8442720.

The previous prime is 20125519. The next prime is 20125537. The reversal of 20125534 is 43552102.

It is a Harshad number since it is a multiple of its sum of digits (22).

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (20125537) by changing a digit.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 1012 + ... + 6424.

It is an arithmetic number, because the mean of its divisors is an integer number (1486143).

Almost surely, 2^20125534 is an apocalyptic number.

20125534 is a deficient number, since it is larger than the sum of its proper divisors (15541898).

20125534 is a wasteful number, since it uses less digits than its factorization.

20125534 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 5452 (or 5439 counting only the distinct ones).

The product of its (nonzero) digits is 1200, while the sum is 22.

The square root of 20125534 is about 4486.1491281499. The cubic root of 20125534 is about 272.0084970673.

Adding to 20125534 its reverse (43552102), we get a palindrome (63677636).

The spelling of 20125534 in words is "twenty million, one hundred twenty-five thousand, five hundred thirty-four".