20883487 has 2 divisors, whose sum is σ = 20883488. Its totient is φ = 20883486.

The previous prime is 20883479. The next prime is 20883493. The reversal of 20883487 is 78438802.

It is a strong prime.

It is a cyclic number.

It is not a de Polignac number, because 20883487 - 2³ = 20883479 is a prime.

It is a super-2 number, since 2×20883487² = 872240058558338, which contains 22 as substring.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (20883407) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 10441743 + 10441744.

It is an arithmetic number, because the mean of its divisors is an integer number (10441744).

Almost surely, 2^20883487 is an apocalyptic number.

20883487 is a deficient number, since it is larger than the sum of its proper divisors (1).

20883487 is an equidigital number, since it uses as much as digits as its factorization.

20883487 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 86016, while the sum is 40.

The square root of 20883487 is about 4569.8454021991. The cubic root of 20883487 is about 275.3812321357.

The spelling of 20883487 in words is "twenty million, eight hundred eighty-three thousand, four hundred eighty-seven".