20294987 has 8 divisors (see below), whose sum is σ = 21071232. Its totient is φ = 19526400.

The previous prime is 20294977. The next prime is 20295013. The reversal of 20294987 is 78949202.

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 20294987 - 2¹⁰ = 20293963 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (20294917) 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, 3803 + ... + 7419.

It is an arithmetic number, because the mean of its divisors is an integer number (2633904).

Almost surely, 2^20294987 is an apocalyptic number.

20294987 is a deficient number, since it is larger than the sum of its proper divisors (776245).

20294987 is a wasteful number, since it uses less digits than its factorization.

20294987 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 3829.

The product of its (nonzero) digits is 72576, while the sum is 41.

The square root of 20294987 is about 4504.9957824620. The cubic root of 20294987 is about 272.7697835989.

The spelling of 20294987 in words is "twenty million, two hundred ninety-four thousand, nine hundred eighty-seven".