20015070 has 32 divisors (see below), whose sum is σ = 48155040. Its totient is φ = 5324160.

The previous prime is 20015059. The next prime is 20015087. The reversal of 20015070 is 7051002.

It is a happy number.

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

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 20800 + ... + 21740.

It is an arithmetic number, because the mean of its divisors is an integer number (1504845).

Almost surely, 2^20015070 is an apocalyptic number.

20015070 is an abundant number, since it is smaller than the sum of its proper divisors (28139970).

It is a pseudoperfect number, because it is the sum of a subset of its proper divisors.

20015070 is a wasteful number, since it uses less digits than its factorization.

20015070 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1660.

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

The square root of 20015070 is about 4473.8205149514. The cubic root of 20015070 is about 271.5099216653.

Adding to 20015070 its reverse (7051002), we get a palindrome (27066072).

The spelling of 20015070 in words is "twenty million, fifteen thousand, seventy".