20115007 has 4 divisors (see below), whose sum is σ = 21943656. Its totient is φ = 18286360.

The previous prime is 20114993. The next prime is 20115023. The reversal of 20115007 is 70051102.

It is a semiprime because it is the product of two primes.

It is a cyclic number.

It is not a de Polignac number, because 20115007 - 2⁷ = 20114879 is a prime.

It is a super-2 number, since 2×20115007² = 809227013220098, which contains 22 as substring.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (20115307) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 914308 + ... + 914329.

It is an arithmetic number, because the mean of its divisors is an integer number (5485914).

Almost surely, 2^20115007 is an apocalyptic number.

20115007 is a deficient number, since it is larger than the sum of its proper divisors (1828649).

20115007 is a wasteful number, since it uses less digits than its factorization.

20115007 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1828648.

The product of its (nonzero) digits is 70, while the sum is 16.

The square root of 20115007 is about 4484.9756967012. The cubic root of 20115007 is about 271.9610625852.

Adding to 20115007 its reverse (70051102), we get a palindrome (90166109).

The spelling of 20115007 in words is "twenty million, one hundred fifteen thousand, seven".