20573353520 has 40 divisors (see below), whose sum is σ = 50350579440. Its totient is φ = 7796217600.

The previous prime is 20573353519. The next prime is 20573353529. The reversal of 20573353520 is 2535337502.

It is a tau number, because it is divible by the number of its divisors (40).

It is not an unprimeable number, because it can be changed into a prime (20573353529) 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, 6766031 + ... + 6769070.

It is an arithmetic number, because the mean of its divisors is an integer number (1258764486).

Almost surely, 2^20573353520 is an apocalyptic number.

20573353520 is a gapful number since it is divisible by the number (20) formed by its first and last digit.

It is an amenable number.

20573353520 is an abundant number, since it is smaller than the sum of its proper divisors (29777225920).

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

20573353520 is a wasteful number, since it uses less digits than its factorization.

20573353520 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 13535133 (or 13535127 counting only the distinct ones).

The product of its (nonzero) digits is 94500, while the sum is 35.

The spelling of 20573353520 in words is "twenty billion, five hundred seventy-three million, three hundred fifty-three thousand, five hundred twenty".