20745001 has 8 divisors (see below), whose sum is σ = 21250944. Its totient is φ = 20241840.

The previous prime is 20744987. The next prime is 20745007. The reversal of 20745001 is 10054702.

It is a sphenic number, since it is the product of 3 distinct primes.

It is a cyclic number.

It is not a de Polignac number, because 20745001 - 2¹⁹ = 20220713 is a prime.

It is a Duffinian number.

It is a self number, because there is not a number n which added to its sum of digits gives 20745001.

It is not an unprimeable number, because it can be changed into a prime (20745007) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 26451 + ... + 27223.

It is an arithmetic number, because the mean of its divisors is an integer number (2656368).

Almost surely, 2^20745001 is an apocalyptic number.

It is an amenable number.

20745001 is a deficient number, since it is larger than the sum of its proper divisors (505943).

20745001 is an equidigital number, since it uses as much as digits as its factorization.

20745001 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1391.

The product of its (nonzero) digits is 280, while the sum is 19.

The square root of 20745001 is about 4554.6680449842. The cubic root of 20745001 is about 274.7711639011.

Adding to 20745001 its reverse (10054702), we get a palindrome (30799703).

The spelling of 20745001 in words is "twenty million, seven hundred forty-five thousand, one".