20146491 has 18 divisors (see below), whose sum is σ = 29525028. Its totient is φ = 13237560.

The previous prime is 20146471. The next prime is 20146523. The reversal of 20146491 is 19464102.

20146491 is a `hidden beast` number, since 2 + 0 + 14 + 649 + 1 = 666.

It is not a de Polignac number, because 20146491 - 2⁷ = 20146363 is a prime.

It is a super-2 number, since 2×20146491² = 811762199226162, which contains 22 as substring.

It is not an unprimeable number, because it can be changed into a prime (20146421) by changing a digit.

It is a polite number, since it can be written in 17 ways as a sum of consecutive naturals, for example, 95376 + ... + 95586.

Almost surely, 2^20146491 is an apocalyptic number.

20146491 is a deficient number, since it is larger than the sum of its proper divisors (9378537).

20146491 is a wasteful number, since it uses less digits than its factorization.

20146491 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 423 (or 317 counting only the distinct ones).

The product of its (nonzero) digits is 1728, while the sum is 27.

The square root of 20146491 is about 4488.4842653172. The cubic root of 20146491 is about 272.1028797315.

The spelling of 20146491 in words is "twenty million, one hundred forty-six thousand, four hundred ninety-one".