20152231102045 has 32 divisors (see below), whose sum is σ = 27686989147392. Its totient is φ = 13793868920832.

The previous prime is 20152231102033. The next prime is 20152231102049. The reversal of 20152231102045 is 54020113225102.

It is a happy number.

It is not a de Polignac number, because 20152231102045 - 2¹⁹ = 20152230577757 is a prime.

It is a super-2 number, since 2×20152231102045² (a number of 27 digits) 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 (20152231102049) 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, 54005229 + ... + 54377101.

It is an arithmetic number, because the mean of its divisors is an integer number (865218410856).

Almost surely, 2^{20152231102045} is an apocalyptic number.

It is an amenable number.

20152231102045 is a deficient number, since it is larger than the sum of its proper divisors (7534758045347).

20152231102045 is a wasteful number, since it uses less digits than its factorization.

20152231102045 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 374661.

The product of its (nonzero) digits is 4800, while the sum is 28.

Adding to 20152231102045 its reverse (54020113225102), we get a palindrome (74172344327147).

The spelling of 20152231102045 in words is "twenty trillion, one hundred fifty-two billion, two hundred thirty-one million, one hundred two thousand, forty-five".