20533350387 has 8 divisors (see below), whose sum is σ = 29866691520. Its totient is φ = 12444454760.

The previous prime is 20533350377. The next prime is 20533350419. The reversal of 20533350387 is 78305333502.

It is a happy number.

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 20533350387 - 2⁶ = 20533350323 is a prime.

It is not an unprimeable number, because it can be changed into a prime (20533350377) 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, 311111337 + ... + 311111402.

It is an arithmetic number, because the mean of its divisors is an integer number (3733336440).

Almost surely, 2^20533350387 is an apocalyptic number.

20533350387 is a deficient number, since it is larger than the sum of its proper divisors (9333341133).

20533350387 is a wasteful number, since it uses less digits than its factorization.

20533350387 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 622222753.

The product of its (nonzero) digits is 226800, while the sum is 39.

Adding to 20533350387 its reverse (78305333502), we get a palindrome (98838683889).

The spelling of 20533350387 in words is "twenty billion, five hundred thirty-three million, three hundred fifty thousand, three hundred eighty-seven".