20015123425 has 12 divisors (see below), whose sum is σ = 27075003696. Its totient is φ = 14556453200.

The previous prime is 20015123413. The next prime is 20015123473. The reversal of 20015123425 is 52432151002.

It is not a de Polignac number, because 20015123425 - 2¹⁵ = 20015090657 is a prime.

It is a Harshad number since it is a multiple of its sum of digits (25).

It is a Duffinian number.

It is a self number, because there is not a number n which added to its sum of digits gives 20015123425.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 36390859 + ... + 36391408.

It is an arithmetic number, because the mean of its divisors is an integer number (2256250308).

Almost surely, 2^20015123425 is an apocalyptic number.

20015123425 is a gapful number since it is divisible by the number (25) formed by its first and last digit.

It is an amenable number.

20015123425 is a deficient number, since it is larger than the sum of its proper divisors (7059880271).

20015123425 is a wasteful number, since it uses less digits than its factorization.

20015123425 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 72782288 (or 72782283 counting only the distinct ones).

The product of its (nonzero) digits is 2400, while the sum is 25.

Adding to 20015123425 its reverse (52432151002), we get a palindrome (72447274427).

The spelling of 20015123425 in words is "twenty billion, fifteen million, one hundred twenty-three thousand, four hundred twenty-five".