20151520534 has 4 divisors (see below), whose sum is σ = 30227280804. Its totient is φ = 10075760266.

The previous prime is 20151520511. The next prime is 20151520553. The reversal of 20151520534 is 43502515102.

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

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 5037880132 + ... + 5037880135.

It is an arithmetic number, because the mean of its divisors is an integer number (7556820201).

Almost surely, 2^20151520534 is an apocalyptic number.

20151520534 is a deficient number, since it is larger than the sum of its proper divisors (10075760270).

20151520534 is a wasteful number, since it uses less digits than its factorization.

20151520534 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 10075760269.

The product of its (nonzero) digits is 6000, while the sum is 28.

The spelling of 20151520534 in words is "twenty billion, one hundred fifty-one million, five hundred twenty thousand, five hundred thirty-four".