20973350540 has 96 divisors (see below), whose sum is σ = 45094008960. Its totient is φ = 8192710656.

The previous prime is 20973350521. The next prime is 20973350543. The reversal of 20973350540 is 4505337902.

It is a junction number, because it is equal to n+sod(n) for n = 20973350494 and 20973350503.

It is not an unprimeable number, because it can be changed into a prime (20973350543) by changing a digit.

It is a polite number, since it can be written in 31 ways as a sum of consecutive naturals, for example, 79746449 + ... + 79746711.

It is an arithmetic number, because the mean of its divisors is an integer number (469729260).

Almost surely, 2^20973350540 is an apocalyptic number.

20973350540 is a gapful number since it is divisible by the number (20) formed by its first and last digit.

It is an amenable number.

20973350540 is an abundant number, since it is smaller than the sum of its proper divisors (24120658420).

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

20973350540 is a wasteful number, since it uses less digits than its factorization.

20973350540 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 771 (or 769 counting only the distinct ones).

The product of its (nonzero) digits is 113400, while the sum is 38.

The spelling of 20973350540 in words is "twenty billion, nine hundred seventy-three million, three hundred fifty thousand, five hundred forty".