20533115215 has 8 divisors (see below), whose sum is σ = 24704753040. Its totient is φ = 16383148992.

The previous prime is 20533115179. The next prime is 20533115221. The reversal of 20533115215 is 51251133502.

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 20533115215 - 2¹⁵ = 20533082447 is a prime.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 5415814 + ... + 5419603.

It is an arithmetic number, because the mean of its divisors is an integer number (3088094130).

Almost surely, 2^20533115215 is an apocalyptic number.

20533115215 is a deficient number, since it is larger than the sum of its proper divisors (4171637825).

20533115215 is a wasteful number, since it uses less digits than its factorization.

20533115215 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 10835801.

The product of its (nonzero) digits is 4500, while the sum is 28.

Adding to 20533115215 its reverse (51251133502), we get a palindrome (71784248717).

The spelling of 20533115215 in words is "twenty billion, five hundred thirty-three million, one hundred fifteen thousand, two hundred fifteen".