20538151 has 8 divisors (see below), whose sum is σ = 21550208. Its totient is φ = 19548000.

The previous prime is 20538143. The next prime is 20538157. The reversal of 20538151 is 15183502.

It is a happy number.

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 20538151 - 2³ = 20538143 is a prime.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (20538157) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 3540 + ... + 7321.

It is an arithmetic number, because the mean of its divisors is an integer number (2693776).

Almost surely, 2^20538151 is an apocalyptic number.

20538151 is a deficient number, since it is larger than the sum of its proper divisors (1012057).

20538151 is a wasteful number, since it uses less digits than its factorization.

20538151 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 10953.

The product of its (nonzero) digits is 1200, while the sum is 25.

The square root of 20538151 is about 4531.9036838838. The cubic root of 20538151 is about 273.8548567956.

The spelling of 20538151 in words is "twenty million, five hundred thirty-eight thousand, one hundred fifty-one".