20015023075 has 12 divisors (see below), whose sum is σ = 24962094288. Its totient is φ = 15919460000.

The previous prime is 20015023057. The next prime is 20015023097. The reversal of 20015023075 is 57032051002.

It is not a de Polignac number, because 20015023075 - 2¹¹ = 20015021027 is a prime.

It is a super-2 number, since 2×20015023075² (a number of 21 digits) contains 22 as substring.

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

It is a Duffinian number.

It is an unprimeable number.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 2309551 + ... + 2318200.

It is an arithmetic number, because the mean of its divisors is an integer number (2080174524).

Almost surely, 2^20015023075 is an apocalyptic number.

20015023075 is a gapful number since it is divisible by the number (25) formed by its first and last digit.

20015023075 is a deficient number, since it is larger than the sum of its proper divisors (4947071213).

20015023075 is a wasteful number, since it uses less digits than its factorization.

20015023075 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 4627934 (or 4627929 counting only the distinct ones).

The product of its (nonzero) digits is 2100, while the sum is 25.

Adding to 20015023075 its reverse (57032051002), we get a palindrome (77047074077).

The spelling of 20015023075 in words is "twenty billion, fifteen million, twenty-three thousand, seventy-five".