20454385680 has 100 divisors (see below), whose sum is σ = 71041134252. Its totient is φ = 5454501120.

The previous prime is 20454385673. The next prime is 20454385697. The reversal of 20454385680 is 8658345402.

20454385680 is a `hidden beast` number, since 2 + 0 + 4 + 54 + 38 + 568 + 0 = 666.

It can be written as a sum of positive squares in 2 ways, for example, as 3367713024 + 17086672656 = 58032^2 + 130716^2 .

It is a Harshad number since it is a multiple of its sum of digits (45).

It is an unprimeable number.

It is a polite number, since it can be written in 19 ways as a sum of consecutive naturals, for example, 1571791 + ... + 1584750.

Almost surely, 2^20454385680 is an apocalyptic number.

20454385680 is a gapful number since it is divisible by the number (20) formed by its first and last digit.

It is an amenable number.

20454385680 is an abundant number, since it is smaller than the sum of its proper divisors (50586748572).

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

20454385680 is a wasteful number, since it uses less digits than its factorization.

20454385680 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 3156566 (or 3156551 counting only the distinct ones).

The product of its (nonzero) digits is 921600, while the sum is 45.

The spelling of 20454385680 in words is "twenty billion, four hundred fifty-four million, three hundred eighty-five thousand, six hundred eighty".