20015151 has 16 divisors (see below), whose sum is σ = 30253440. Its totient is φ = 11668320.

The previous prime is 20015147. The next prime is 20015173. The reversal of 20015151 is 15151002.

It is not a de Polignac number, because 20015151 - 2² = 20015147 is a prime.

It is a self number, because there is not a number n which added to its sum of digits gives 20015151.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (20015131) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 12765 + ... + 14246.

It is an arithmetic number, because the mean of its divisors is an integer number (1890840).

Almost surely, 2^20015151 is an apocalyptic number.

20015151 is a deficient number, since it is larger than the sum of its proper divisors (10238289).

20015151 is a wasteful number, since it uses less digits than its factorization.

20015151 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 27046.

The product of its (nonzero) digits is 50, while the sum is 15.

The square root of 20015151 is about 4473.8295676076. The cubic root of 20015151 is about 271.5102879272.

Adding to 20015151 its reverse (15151002), we get a palindrome (35166153).

It can be divided in two parts, 200 and 15151, that added together give a palindrome (15351).

The spelling of 20015151 in words is "twenty million, fifteen thousand, one hundred fifty-one".