20533298487 has 8 divisors (see below), whose sum is σ = 29483710704. Its totient is φ = 12635875968.

The previous prime is 20533298329. The next prime is 20533298497. The reversal of 20533298487 is 78489233502.

It is a sphenic number, since it is the product of 3 distinct primes.

It is a de Polignac number, because none of the positive numbers 2^k-20533298487 is a prime.

It is a Smith number, since the sum of its digits (51) coincides with the sum of the digits of its prime factors. Since it is squarefree, it is also a hoax number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (20533298497) 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, 263247378 + ... + 263247455.

It is an arithmetic number, because the mean of its divisors is an integer number (3685463838).

Almost surely, 2^20533298487 is an apocalyptic number.

20533298487 is a deficient number, since it is larger than the sum of its proper divisors (8950412217).

20533298487 is a wasteful number, since it uses less digits than its factorization.

20533298487 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 526494849.

The product of its (nonzero) digits is 2903040, while the sum is 51.

The spelling of 20533298487 in words is "twenty billion, five hundred thirty-three million, two hundred ninety-eight thousand, four hundred eighty-seven".