21076157 has 8 divisors (see below), whose sum is σ = 21547680. Its totient is φ = 20608560.

The previous prime is 21076147. The next prime is 21076189. The reversal of 21076157 is 75167012.

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 21076157 - 2⁶ = 21076093 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 (21076147) 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, 11603 + ... + 13295.

It is an arithmetic number, because the mean of its divisors is an integer number (2693460).

Almost surely, 2^21076157 is an apocalyptic number.

It is an amenable number.

21076157 is a deficient number, since it is larger than the sum of its proper divisors (471523).

21076157 is a wasteful number, since it uses less digits than its factorization.

21076157 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1963.

The product of its (nonzero) digits is 2940, while the sum is 29.

The square root of 21076157 is about 4590.8775849504. The cubic root of 21076157 is about 276.2255254281.

It can be divided in two parts, 210 and 76157, that added together give a palindrome (76367).

The spelling of 21076157 in words is "twenty-one million, seventy-six thousand, one hundred fifty-seven".