20405450460 has 48 divisors (see below), whose sum is σ = 57152342016. Its totient is φ = 5439826752.

The previous prime is 20405450449. The next prime is 20405450561. The reversal of 20405450460 is 6405450402.

It is a Harshad number since it is a multiple of its sum of digits (30).

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 158677 + ... + 256883.

It is an arithmetic number, because the mean of its divisors is an integer number (1190673792).

Almost surely, 2^20405450460 is an apocalyptic number.

20405450460 is a gapful number since it is divisible by the number (20) formed by its first and last digit.

It is an amenable number.

20405450460 is an abundant number, since it is smaller than the sum of its proper divisors (36746891556).

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

20405450460 is a wasteful number, since it uses less digits than its factorization.

20405450460 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 101682 (or 101680 counting only the distinct ones).

The product of its (nonzero) digits is 19200, while the sum is 30.

The spelling of 20405450460 in words is "twenty billion, four hundred five million, four hundred fifty thousand, four hundred sixty".