20774157 has 8 divisors (see below), whose sum is σ = 27958176. Its totient is φ = 13719792.

The previous prime is 20774147. The next prime is 20774161. The reversal of 20774157 is 75147702.

It is a happy number.

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

It is not a de Polignac number, because 20774157 - 2⁸ = 20773901 is a prime.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (20774147) 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, 32038 + ... + 32679.

It is an arithmetic number, because the mean of its divisors is an integer number (3494772).

Almost surely, 2^20774157 is an apocalyptic number.

It is an amenable number.

20774157 is a deficient number, since it is larger than the sum of its proper divisors (7184019).

20774157 is a wasteful number, since it uses less digits than its factorization.

20774157 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 64827.

The product of its (nonzero) digits is 13720, while the sum is 33.

The square root of 20774157 is about 4557.8675935134. The cubic root of 20774157 is about 274.8998290811.

The spelling of 20774157 in words is "twenty million, seven hundred seventy-four thousand, one hundred fifty-seven".