21054214234 has 8 divisors (see below), whose sum is σ = 31619511648. Its totient is φ = 10514377020.

The previous prime is 21054214187. The next prime is 21054214289. The reversal of 21054214234 is 43241245012.

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

It is a super-2 number, since 2×21054214234² (a number of 21 digits) contains 22 as substring.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 6362982 + ... + 6366289.

It is an arithmetic number, because the mean of its divisors is an integer number (3952438956).

Almost surely, 2^21054214234 is an apocalyptic number.

21054214234 is a deficient number, since it is larger than the sum of its proper divisors (10565297414).

21054214234 is a wasteful number, since it uses less digits than its factorization.

21054214234 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 12730100.

The product of its (nonzero) digits is 7680, while the sum is 28.

Adding to 21054214234 its reverse (43241245012), we get a palindrome (64295459246).

The spelling of 21054214234 in words is "twenty-one billion, fifty-four million, two hundred fourteen thousand, two hundred thirty-four".