20933459856 has 75 divisors (see below), whose sum is σ = 60602585131. Its totient is φ = 6976083744.

The previous prime is 20933459839. The next prime is 20933459857. The reversal of 20933459856 is 65895433902.

The square root of 20933459856 is 144684.

It is a perfect power (a square), and thus also a powerful number.

20933459856 is a `hidden beast` number, since 20 + 93 + 3 + 459 + 85 + 6 = 666.

It is a Harshad number since it is a multiple of its sum of digits (54).

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (20933459857) by changing a digit.

It is a polite number, since it can be written in 14 ways as a sum of consecutive naturals, for example, 5206615 + ... + 5210633.

Almost surely, 2^20933459856 is an apocalyptic number.

20933459856 is the 144684-th square number.

It is an amenable number.

20933459856 is an abundant number, since it is smaller than the sum of its proper divisors (39669125275).

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

20933459856 is an frugal number, since it uses more digits than its factorization.

20933459856 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 8058 (or 4024 counting only the distinct ones).

The product of its (nonzero) digits is 6998400, while the sum is 54.

The spelling of 20933459856 in words is "twenty billion, nine hundred thirty-three million, four hundred fifty-nine thousand, eight hundred fifty-six".