20701445 has 12 divisors (see below), whose sum is σ = 25186476. Its totient is φ = 16334400.

The previous prime is 20701441. The next prime is 20701451. The reversal of 20701445 is 54410702.

It can be written as a sum of positive squares in 2 ways, for example, as 12737761 + 7963684 = 3569^2 + 2822^2 .

It is not a de Polignac number, because 20701445 - 2² = 20701441 is a prime.

It is a hoax number, since the sum of its digits (23) coincides with the sum of the digits of its distinct prime factors.

It is a Duffinian number.

It is a Curzon number.

It is a self number, because there is not a number n which added to its sum of digits gives 20701445.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (20701441) by changing a digit.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 34145 + ... + 34745.

It is an arithmetic number, because the mean of its divisors is an integer number (2098873).

Almost surely, 2^20701445 is an apocalyptic number.

It is an amenable number.

20701445 is a deficient number, since it is larger than the sum of its proper divisors (4485031).

20701445 is an frugal number, since it uses more digits than its factorization.

20701445 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 772 (or 689 counting only the distinct ones).

The product of its (nonzero) digits is 1120, while the sum is 23.

The square root of 20701445 is about 4549.8840644570. The cubic root of 20701445 is about 274.5787268811.

The spelling of 20701445 in words is "twenty million, seven hundred one thousand, four hundred forty-five".