19934157 has 16 divisors (see below), whose sum is σ = 27885312. Its totient is φ = 12651840.

The previous prime is 19934143. The next prime is 19934171. The reversal of 19934157 is 75143991.

It is a happy number.

It is an interprime number because it is at equal distance from previous prime (19934143) and next prime (19934171).

It is not a de Polignac number, because 19934157 - 2⁶ = 19934093 is a prime.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (19934137) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 3307 + ... + 7127.

It is an arithmetic number, because the mean of its divisors is an integer number (1742832).

Almost surely, 2^19934157 is an apocalyptic number.

It is an amenable number.

19934157 is a deficient number, since it is larger than the sum of its proper divisors (7951155).

19934157 is a wasteful number, since it uses less digits than its factorization.

19934157 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 3908.

The product of its digits is 34020, while the sum is 39.

The square root of 19934157 is about 4464.7684150469. The cubic root of 19934157 is about 271.1435585113.

The spelling of 19934157 in words is "nineteen million, nine hundred thirty-four thousand, one hundred fifty-seven".