20211432215 has 16 divisors (see below), whose sum is σ = 26122758816. Its totient is φ = 14923440000.

The previous prime is 20211432211. The next prime is 20211432221. The reversal of 20211432215 is 51223411202.

It is not a de Polignac number, because 20211432215 - 2² = 20211432211 is a prime.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (20211432211) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 667760 + ... + 697370.

It is an arithmetic number, because the mean of its divisors is an integer number (1632672426).

Almost surely, 2^20211432215 is an apocalyptic number.

20211432215 is a deficient number, since it is larger than the sum of its proper divisors (5911326601).

20211432215 is a wasteful number, since it uses less digits than its factorization.

20211432215 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 40130.

The product of its (nonzero) digits is 960, while the sum is 23.

Adding to 20211432215 its reverse (51223411202), we get a palindrome (71434843417).

The spelling of 20211432215 in words is "twenty billion, two hundred eleven million, four hundred thirty-two thousand, two hundred fifteen".