20770151 has 4 divisors (see below), whose sum is σ = 20784600. Its totient is φ = 20755704.

The previous prime is 20770147. The next prime is 20770163. The reversal of 20770151 is 15107702.

It is a happy number.

It is a semiprime because it is the product of two primes.

It is a cyclic number.

It is not a de Polignac number, because 20770151 - 2² = 20770147 is a prime.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (20770121) 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, 4796 + ... + 8033.

It is an arithmetic number, because the mean of its divisors is an integer number (5196150).

Almost surely, 2^20770151 is an apocalyptic number.

20770151 is a deficient number, since it is larger than the sum of its proper divisors (14449).

20770151 is a wasteful number, since it uses less digits than its factorization.

20770151 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 14448.

The product of its (nonzero) digits is 490, while the sum is 23.

The square root of 20770151 is about 4557.4281124336. The cubic root of 20770151 is about 274.8821577743.

Adding to 20770151 its reverse (15107702), we get a palindrome (35877853).

The spelling of 20770151 in words is "twenty million, seven hundred seventy thousand, one hundred fifty-one".