20015332154 has 4 divisors (see below), whose sum is σ = 30022998234. Its totient is φ = 10007666076.

The previous prime is 20015332147. The next prime is 20015332171. The reversal of 20015332154 is 45123351002.

It is a happy number.

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

It can be written as a sum of positive squares in only one way, i.e., 16976787025 + 3038545129 = 130295^2 + 55123^2 .

It is a super-2 number, since 2×20015332154² (a number of 21 digits) contains 22 as substring.

It is an unprimeable number.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 5003833037 + ... + 5003833040.

Almost surely, 2^20015332154 is an apocalyptic number.

20015332154 is a deficient number, since it is larger than the sum of its proper divisors (10007666080).

20015332154 is a wasteful number, since it uses less digits than its factorization.

20015332154 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 10007666079.

The product of its (nonzero) digits is 3600, while the sum is 26.

Adding to 20015332154 its reverse (45123351002), we get a palindrome (65138683156).

The spelling of 20015332154 in words is "twenty billion, fifteen million, three hundred thirty-two thousand, one hundred fifty-four".