20700453 has 4 divisors (see below), whose sum is σ = 27600608. Its totient is φ = 13800300.

The previous prime is 20700451. The next prime is 20700457. The reversal of 20700453 is 35400702.

It is a happy number.

It is a semiprime because it is the product of two primes, and also a Blum integer, because the two primes are equal to 3 mod 4.

It is not a de Polignac number, because 20700453 - 2¹ = 20700451 is a prime.

It is a Duffinian number.

It is a Curzon number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (20700451) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 3450073 + ... + 3450078.

It is an arithmetic number, because the mean of its divisors is an integer number (6900152).

Almost surely, 2^20700453 is an apocalyptic number.

It is an amenable number.

20700453 is a deficient number, since it is larger than the sum of its proper divisors (6900155).

20700453 is an equidigital number, since it uses as much as digits as its factorization.

20700453 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 6900154.

The product of its (nonzero) digits is 840, while the sum is 21.

The square root of 20700453 is about 4549.7750493843. The cubic root of 20700453 is about 274.5743409321.

The spelling of 20700453 in words is "twenty million, seven hundred thousand, four hundred fifty-three".