21434030031 has 8 divisors (see below), whose sum is σ = 28663511344. Its totient is φ = 14246951040.

The previous prime is 21434030011. The next prime is 21434030053. The reversal of 21434030031 is 13003043412.

It is a sphenic number, since it is the product of 3 distinct primes.

It is not a de Polignac number, because 21434030031 - 2³⁴ = 4254160847 is a prime.

It is a super-2 number, since 2×21434030031² (a number of 21 digits) contains 22 as substring.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (21434030011) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 10599400 + ... + 10601421.

It is an arithmetic number, because the mean of its divisors is an integer number (3582938918).

Almost surely, 2^21434030031 is an apocalyptic number.

21434030031 is a deficient number, since it is larger than the sum of its proper divisors (7229481313).

21434030031 is a wasteful number, since it uses less digits than its factorization.

21434030031 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 21201161.

The product of its (nonzero) digits is 864, while the sum is 21.

Adding to 21434030031 its reverse (13003043412), we get a palindrome (34437073443).

The spelling of 21434030031 in words is "twenty-one billion, four hundred thirty-four million, thirty thousand, thirty-one".