21134015707 has 6 divisors (see below), whose sum is σ = 24584467308. Its totient is φ = 18114870564.

The previous prime is 21134015699. The next prime is 21134015729. The reversal of 21134015707 is 70751043112.

It is not a de Polignac number, because 21134015707 - 2³ = 21134015699 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (21134015767) by changing a digit.

It is a polite number, since it can be written in 5 ways as a sum of consecutive naturals, for example, 215653173 + ... + 215653270.

It is an arithmetic number, because the mean of its divisors is an integer number (4097411218).

Almost surely, 2^21134015707 is an apocalyptic number.

21134015707 is a deficient number, since it is larger than the sum of its proper divisors (3450451601).

21134015707 is an equidigital number, since it uses as much as digits as its factorization.

21134015707 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 431306457 (or 431306450 counting only the distinct ones).

The product of its (nonzero) digits is 5880, while the sum is 31.

Adding to 21134015707 its reverse (70751043112), we get a palindrome (91885058819).

The spelling of 21134015707 in words is "twenty-one billion, one hundred thirty-four million, fifteen thousand, seven hundred seven".