20453521531662 has 80 divisors (see below), whose sum is σ = 46908518439552. Its totient is φ = 6657633032400.

The previous prime is 20453521531627. The next prime is 20453521531669. The reversal of 20453521531662 is 26613512535402.

20453521531662 is a `hidden beast` number, since 2 + 0 + 4 + 5 + 3 + 52 + 1 + 531 + 6 + 62 = 666.

It is a super-2 number, since 2×20453521531662² (a number of 27 digits) contains 22 as substring.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (20453521531669) by changing a digit.

It is a polite number, since it can be written in 39 ways as a sum of consecutive naturals, for example, 27856863 + ... + 28581669.

Almost surely, 2^{20453521531662} is an apocalyptic number.

It is a practical number, because each smaller number is the sum of distinct divisors of 20453521531662, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (23454259219776).

20453521531662 is an abundant number, since it is smaller than the sum of its proper divisors (26454996907890).

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

20453521531662 is a wasteful number, since it uses less digits than its factorization.

20453521531662 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 728915 (or 728906 counting only the distinct ones).

The product of its (nonzero) digits is 1296000, while the sum is 45.

The spelling of 20453521531662 in words is "twenty trillion, four hundred fifty-three billion, five hundred twenty-one million, five hundred thirty-one thousand, six hundred sixty-two".