20151534445 has 24 divisors (see below), whose sum is σ = 28147805208. Its totient is φ = 13809398400.

The previous prime is 20151534437. The next prime is 20151534461. The reversal of 20151534445 is 54443515102.

It can be written as a sum of positive squares in 4 ways, for example, as 1637578089 + 18513956356 = 40467^2 + 136066^2 .

It is not a de Polignac number, because 20151534445 - 2³ = 20151534437 is a prime.

It is a Duffinian number.

It is a self number, because there is not a number n which added to its sum of digits gives 20151534445.

It is a congruent number.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 23 ways as a sum of consecutive naturals, for example, 371775 + ... + 422515.

It is an arithmetic number, because the mean of its divisors is an integer number (1172825217).

Almost surely, 2^20151534445 is an apocalyptic number.

It is an amenable number.

20151534445 is a deficient number, since it is larger than the sum of its proper divisors (7996270763).

20151534445 is a wasteful number, since it uses less digits than its factorization.

20151534445 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 52381 (or 52374 counting only the distinct ones).

The product of its (nonzero) digits is 48000, while the sum is 34.

The spelling of 20151534445 in words is "twenty billion, one hundred fifty-one million, five hundred thirty-four thousand, four hundred forty-five".