20454605040 has 160 divisors (see below), whose sum is σ = 67084992000. Its totient is φ = 5141283840.

The previous prime is 20454605011. The next prime is 20454605051. The reversal of 20454605040 is 4050645402.

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

It is a junction number, because it is equal to n+sod(n) for n = 20454604989 and 20454605007.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 31 ways as a sum of consecutive naturals, for example, 896170 + ... + 918710.

It is an arithmetic number, because the mean of its divisors is an integer number (419281200).

Almost surely, 2^20454605040 is an apocalyptic number.

20454605040 is a gapful number since it is divisible by the number (20) formed by its first and last digit.

It is an amenable number.

It is a practical number, because each smaller number is the sum of distinct divisors of 20454605040, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (33542496000).

20454605040 is an abundant number, since it is smaller than the sum of its proper divisors (46630386960).

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

20454605040 is a wasteful number, since it uses less digits than its factorization.

20454605040 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 22775 (or 22769 counting only the distinct ones).

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

The spelling of 20454605040 in words is "twenty billion, four hundred fifty-four million, six hundred five thousand, forty".