21431404034 has 32 divisors (see below), whose sum is σ = 33728217600. Its totient is φ = 10200453120.

The previous prime is 21431404009. The next prime is 21431404081. The reversal of 21431404034 is 43040413412.

It is a super-3 number, since 3×21431404034³ (a number of 32 digits) contains 333 as substring.

It is a junction number, because it is equal to n+sod(n) for n = 21431403994 and 21431404012.

It is an unprimeable number.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 3191072 + ... + 3197780.

It is an arithmetic number, because the mean of its divisors is an integer number (1054006800).

Almost surely, 2^21431404034 is an apocalyptic number.

21431404034 is a deficient number, since it is larger than the sum of its proper divisors (12296813566).

21431404034 is a wasteful number, since it uses less digits than its factorization.

21431404034 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 7578.

The product of its (nonzero) digits is 4608, while the sum is 26.

Adding to 21431404034 its reverse (43040413412), we get a palindrome (64471817446).

The spelling of 21431404034 in words is "twenty-one billion, four hundred thirty-one million, four hundred four thousand, thirty-four".