20000715 has 32 divisors (see below), whose sum is σ = 36771840. Its totient is φ = 9093504.

The previous prime is 20000713. The next prime is 20000723. The reversal of 20000715 is 51700002.

It is a happy number.

It is not a de Polignac number, because 20000715 - 2¹ = 20000713 is a prime.

It is a super-2 number, since 2×20000715² = 800057201022450, which contains 22 as substring.

It is a Harshad number since it is a multiple of its sum of digits (15).

20000715 is a modest number, since divided by 715 gives 20 as remainder.

It is a junction number, because it is equal to n+sod(n) for n = 20000694 and 20000703.

It is not an unprimeable number, because it can be changed into a prime (20000713) by changing a digit.

It is a polite number, since it can be written in 31 ways as a sum of consecutive naturals, for example, 24697 + ... + 25493.

It is an arithmetic number, because the mean of its divisors is an integer number (1149120).

Almost surely, 2^20000715 is an apocalyptic number.

20000715 is a deficient number, since it is larger than the sum of its proper divisors (16771125).

20000715 is a wasteful number, since it uses less digits than its factorization.

20000715 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1051.

The product of its (nonzero) digits is 70, while the sum is 15.

The square root of 20000715 is about 4472.2158937153. The cubic root of 20000715 is about 271.4449963019. Note that the first 3 decimals are identical.

Adding to 20000715 its reverse (51700002), we get a palindrome (71700717).

The spelling of 20000715 in words is "twenty million, seven hundred fifteen", and thus it is an aban number.