20125502 has 4 divisors (see below), whose sum is σ = 30188256. Its totient is φ = 10062750.

The previous prime is 20125471. The next prime is 20125513. The reversal of 20125502 is 20552102.

It is a semiprime because it is the product of two primes, and also an emirpimes, since its reverse is a distinct semiprime: 20552102 = 2 ⋅10276051.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 5031374 + ... + 5031377.

It is an arithmetic number, because the mean of its divisors is an integer number (7547064).

Almost surely, 2^20125502 is an apocalyptic number.

20125502 is a deficient number, since it is larger than the sum of its proper divisors (10062754).

20125502 is a wasteful number, since it uses less digits than its factorization.

20125502 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 10062753.

The product of its (nonzero) digits is 200, while the sum is 17.

The square root of 20125502 is about 4486.1455616152. The cubic root of 20125502 is about 272.0083529009.

Adding to 20125502 its reverse (20552102), we get a palindrome (40677604).

The spelling of 20125502 in words is "twenty million, one hundred twenty-five thousand, five hundred two".