20453670 has 96 divisors (see below), whose sum is σ = 57081024. Its totient is φ = 5068800.

The previous prime is 20453663. The next prime is 20453683. The reversal of 20453670 is 7635402.

It is a happy number.

It is a hoax number, since the sum of its digits (27) coincides with the sum of the digits of its distinct prime factors.

It is a Curzon number.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 47 ways as a sum of consecutive naturals, for example, 84750 + ... + 84990.

It is an arithmetic number, because the mean of its divisors is an integer number (594594).

Almost surely, 2^20453670 is an apocalyptic number.

It is a practical number, because each smaller number is the sum of distinct divisors of 20453670, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (28540512).

20453670 is an abundant number, since it is smaller than the sum of its proper divisors (36627354).

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

20453670 is a wasteful number, since it uses less digits than its factorization.

20453670 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 318 (or 315 counting only the distinct ones).

The product of its (nonzero) digits is 5040, while the sum is 27.

The square root of 20453670 is about 4522.5733824892. The cubic root of 20453670 is about 273.4788520535.

The spelling of 20453670 in words is "twenty million, four hundred fifty-three thousand, six hundred seventy".