20487351 has 8 divisors (see below), whose sum is σ = 27500400. Its totient is φ = 13566272.

The previous prime is 20487343. The next prime is 20487359. The reversal of 20487351 is 15378402.

It is an interprime number because it is at equal distance from previous prime (20487343) and next prime (20487359).

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 20487351 - 2³ = 20487343 is a prime.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (20487359) 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, 22470 + ... + 23363.

It is an arithmetic number, because the mean of its divisors is an integer number (3437550).

Almost surely, 2^20487351 is an apocalyptic number.

20487351 is a deficient number, since it is larger than the sum of its proper divisors (7013049).

20487351 is a wasteful number, since it uses less digits than its factorization.

20487351 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 45985.

The product of its (nonzero) digits is 6720, while the sum is 30.

The square root of 20487351 is about 4526.2955051565. The cubic root of 20487351 is about 273.6288820139.

The spelling of 20487351 in words is "twenty million, four hundred eighty-seven thousand, three hundred fifty-one".