21054214235 has 32 divisors (see below), whose sum is σ = 26141294592. Its totient is φ = 16269603840.

The previous prime is 21054214187. The next prime is 21054214289. The reversal of 21054214235 is 53241245012.

It is not a de Polignac number, because 21054214235 - 2⁶ = 21054214171 is a prime.

It is a Duffinian number.

It is a junction number, because it is equal to n+sod(n) for n = 21054214198 and 21054214207.

It is an unprimeable number.

It is a polite number, since it can be written in 31 ways as a sum of consecutive naturals, for example, 9823574 + ... + 9825716.

It is an arithmetic number, because the mean of its divisors is an integer number (816915456).

Almost surely, 2^21054214235 is an apocalyptic number.

21054214235 is a deficient number, since it is larger than the sum of its proper divisors (5087080357).

21054214235 is a wasteful number, since it uses less digits than its factorization.

21054214235 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 2723.

The product of its (nonzero) digits is 9600, while the sum is 29.

Adding to 21054214235 its reverse (53241245012), we get a palindrome (74295459247).

The spelling of 21054214235 in words is "twenty-one billion, fifty-four million, two hundred fourteen thousand, two hundred thirty-five".