20988063 has 12 divisors (see below), whose sum is σ = 30361968. Its totient is φ = 13970880.

The previous prime is 20988061. The next prime is 20988089. The reversal of 20988063 is 36088902.

It is not a de Polignac number, because 20988063 - 2¹ = 20988061 is a prime.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (20988061) by changing a digit.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 6606 + ... + 9252.

It is an arithmetic number, because the mean of its divisors is an integer number (2530164).

Almost surely, 2^20988063 is an apocalyptic number.

20988063 is a deficient number, since it is larger than the sum of its proper divisors (9373905).

20988063 is a wasteful number, since it uses less digits than its factorization.

20988063 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 3534 (or 3531 counting only the distinct ones).

The product of its (nonzero) digits is 20736, while the sum is 36.

The square root of 20988063 is about 4581.2730763402. The cubic root of 20988063 is about 275.8401326858.

The spelling of 20988063 in words is "twenty million, nine hundred eighty-eight thousand, sixty-three".