20745151 has 8 divisors (see below), whose sum is σ = 25103520. Its totient is φ = 16735488.

The previous prime is 20745119. The next prime is 20745161. The reversal of 20745151 is 15154702.

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

It is not a de Polignac number, because 20745151 - 2⁵ = 20745119 is a prime.

It is a super-2 number, since 2×20745151² = 860722580025602, which contains 22 as substring.

It is a Duffinian number.

20745151 is a modest number, since divided by 5151 gives 2074 as remainder.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (20745161) 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, 87046 + ... + 87283.

It is an arithmetic number, because the mean of its divisors is an integer number (3137940).

Almost surely, 2^20745151 is an apocalyptic number.

20745151 is a deficient number, since it is larger than the sum of its proper divisors (4358369).

20745151 is a wasteful number, since it uses less digits than its factorization.

20745151 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 174353.

The product of its (nonzero) digits is 1400, while the sum is 25.

The square root of 20745151 is about 4554.6845115771. The cubic root of 20745151 is about 274.7718261583.

Adding to 20745151 its reverse (15154702), we get a palindrome (35899853).

It can be divided in two parts, 2074 and 5151, that added together give a square (7225 = 85²).

The spelling of 20745151 in words is "twenty million, seven hundred forty-five thousand, one hundred fifty-one".