21333131434 has 16 divisors (see below), whose sum is σ = 32553057600. Its totient is φ = 10483548064.

The previous prime is 21333131387. The next prime is 21333131473. The reversal of 21333131434 is 43413133312.

It is an unprimeable number.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 329104 + ... + 388555.

It is an arithmetic number, because the mean of its divisors is an integer number (2034566100).

Almost surely, 2^21333131434 is an apocalyptic number.

21333131434 is a deficient number, since it is larger than the sum of its proper divisors (11219926166).

21333131434 is a wasteful number, since it uses less digits than its factorization.

21333131434 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 717917.

The product of its digits is 7776, while the sum is 28.

Adding to 21333131434 its reverse (43413133312), we get a palindrome (64746264746).

The spelling of 21333131434 in words is "twenty-one billion, three hundred thirty-three million, one hundred thirty-one thousand, four hundred thirty-four".