20453514340 has 72 divisors (see below), whose sum is σ = 50020044480. Its totient is φ = 7004910528.

The previous prime is 20453514337. The next prime is 20453514353. The reversal of 20453514340 is 4341535402.

It is an unprimeable number.

It is a polite number, since it can be written in 23 ways as a sum of consecutive naturals, for example, 917041 + ... + 939079.

It is an arithmetic number, because the mean of its divisors is an integer number (694722840).

Almost surely, 2^20453514340 is an apocalyptic number.

20453514340 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 20453514340, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (25010022240).

20453514340 is an abundant number, since it is smaller than the sum of its proper divisors (29566530140).

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

20453514340 is a wasteful number, since it uses less digits than its factorization.

20453514340 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 23009 (or 23000 counting only the distinct ones).

The product of its (nonzero) digits is 28800, while the sum is 31.

The spelling of 20453514340 in words is "twenty billion, four hundred fifty-three million, five hundred fourteen thousand, three hundred forty".