20529793388 has 24 divisors (see below), whose sum is σ = 39634445760. Its totient is φ = 9244183680.

The previous prime is 20529793367. The next prime is 20529793393. The reversal of 20529793388 is 88339792502.

It is a Smith number, since the sum of its digits (56) coincides with the sum of the digits of its prime factors.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 4812548 + ... + 4816811.

It is an arithmetic number, because the mean of its divisors is an integer number (1651435240).

Almost surely, 2^20529793388 is an apocalyptic number.

It is an amenable number.

20529793388 is a deficient number, since it is larger than the sum of its proper divisors (19104652372).

20529793388 is a wasteful number, since it uses less digits than its factorization.

20529793388 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 9629417 (or 9629415 counting only the distinct ones).

The product of its (nonzero) digits is 6531840, while the sum is 56.

The spelling of 20529793388 in words is "twenty billion, five hundred twenty-nine million, seven hundred ninety-three thousand, three hundred eighty-eight".