20437157 has 8 divisors (see below), whose sum is σ = 22224384. Its totient is φ = 18680688.

The previous prime is 20437121. The next prime is 20437181. The reversal of 20437157 is 75173402.

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

It is not a de Polignac number, because 20437157 - 2⁶ = 20437093 is a prime.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (20437117) 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, 6293 + ... + 8970.

It is an arithmetic number, because the mean of its divisors is an integer number (2778048).

Almost surely, 2^20437157 is an apocalyptic number.

It is an amenable number.

20437157 is a deficient number, since it is larger than the sum of its proper divisors (1787227).

20437157 is a wasteful number, since it uses less digits than its factorization.

20437157 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 15379.

The product of its (nonzero) digits is 5880, while the sum is 29.

The square root of 20437157 is about 4520.7473939604. The cubic root of 20437157 is about 273.4052357273.

The spelling of 20437157 in words is "twenty million, four hundred thirty-seven thousand, one hundred fifty-seven".