20503532156 has 12 divisors (see below), whose sum is σ = 36416721768. Its totient is φ = 10098754512.

The previous prime is 20503532143. The next prime is 20503532173. The reversal of 20503532156 is 65123530502.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 38252591 + ... + 38253126.

It is an arithmetic number, because the mean of its divisors is an integer number (3034726814).

Almost surely, 2^20503532156 is an apocalyptic number.

It is an amenable number.

20503532156 is a deficient number, since it is larger than the sum of its proper divisors (15913189612).

20503532156 is a wasteful number, since it uses less digits than its factorization.

20503532156 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 76505788 (or 76505786 counting only the distinct ones).

The product of its (nonzero) digits is 27000, while the sum is 32.

The spelling of 20503532156 in words is "twenty billion, five hundred three million, five hundred thirty-two thousand, one hundred fifty-six".