21434100361 has 16 divisors (see below), whose sum is σ = 24498288000. Its totient is φ = 18630777088.

The previous prime is 21434100341. The next prime is 21434100371. The reversal of 21434100361 is 16300143412.

It is not a de Polignac number, because 21434100361 - 2¹⁷ = 21433969289 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (21434100301) 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, 933811 + ... + 956488.

It is an arithmetic number, because the mean of its divisors is an integer number (1531143000).

Almost surely, 2^21434100361 is an apocalyptic number.

It is an amenable number.

21434100361 is a deficient number, since it is larger than the sum of its proper divisors (3064187639).

21434100361 is a wasteful number, since it uses less digits than its factorization.

21434100361 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1890368.

The product of its (nonzero) digits is 1728, while the sum is 25.

Adding to 21434100361 its reverse (16300143412), we get a palindrome (37734243773).

The spelling of 21434100361 in words is "twenty-one billion, four hundred thirty-four million, one hundred thousand, three hundred sixty-one".