20723493804 has 24 divisors (see below), whose sum is σ = 52074420720. Its totient is φ = 6376459584.

The previous prime is 20723493803. The next prime is 20723493811. The reversal of 20723493804 is 40839432702.

It is not an unprimeable number, because it can be changed into a prime (20723493803) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 66421299 + ... + 66421610.

It is an arithmetic number, because the mean of its divisors is an integer number (2169767530).

Almost surely, 2^20723493804 is an apocalyptic number.

It is an amenable number.

20723493804 is an abundant number, since it is smaller than the sum of its proper divisors (31350926916).

It is a pseudoperfect number, because it is the sum of a subset of its proper divisors.

20723493804 is a wasteful number, since it uses less digits than its factorization.

20723493804 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 132842929 (or 132842927 counting only the distinct ones).

The product of its (nonzero) digits is 290304, while the sum is 42.

The spelling of 20723493804 in words is "twenty billion, seven hundred twenty-three million, four hundred ninety-three thousand, eight hundred four".