21146133963 has 16 divisors (see below), whose sum is σ = 28489393152. Its totient is φ = 13950300000.

The previous prime is 21146133871. The next prime is 21146133971. The reversal of 21146133963 is 36933164112.

It is a happy number.

It is not a de Polignac number, because 21146133963 - 2¹⁰ = 21146132939 is a prime.

It is a super-2 number, since 2×21146133963² (a number of 21 digits) contains 22 as substring.

It is not an unprimeable number, because it can be changed into a prime (21146133863) 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, 573268 + ... + 609038.

It is an arithmetic number, because the mean of its divisors is an integer number (1780587072).

Almost surely, 2^21146133963 is an apocalyptic number.

21146133963 is a deficient number, since it is larger than the sum of its proper divisors (7343259189).

21146133963 is a wasteful number, since it uses less digits than its factorization.

21146133963 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 37826.

The product of its digits is 69984, while the sum is 39.

The spelling of 21146133963 in words is "twenty-one billion, one hundred forty-six million, one hundred thirty-three thousand, nine hundred sixty-three".