20725123102 has 8 divisors (see below), whose sum is σ = 31749124896. Its totient is φ = 10142081472.

The previous prime is 20725123091. The next prime is 20725123189. The reversal of 20725123102 is 20132152702.

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

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, 110239923 + ... + 110240110.

It is an arithmetic number, because the mean of its divisors is an integer number (3968640612).

Almost surely, 2^20725123102 is an apocalyptic number.

20725123102 is a deficient number, since it is larger than the sum of its proper divisors (11024001794).

20725123102 is a wasteful number, since it uses less digits than its factorization.

20725123102 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 220480082.

The product of its (nonzero) digits is 1680, while the sum is 25.

Adding to 20725123102 its reverse (20132152702), we get a palindrome (40857275804).

The spelling of 20725123102 in words is "twenty billion, seven hundred twenty-five million, one hundred twenty-three thousand, one hundred two".