21034025446 has 16 divisors (see below), whose sum is σ = 36062028576. Its totient is φ = 9013657536.

The previous prime is 21034025393. The next prime is 21034025461. The reversal of 21034025446 is 64452043012.

It is a congruent number.

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 7 ways as a sum of consecutive naturals, for example, 74560 + ... + 218236.

It is an arithmetic number, because the mean of its divisors is an integer number (2253876786).

Almost surely, 2^21034025446 is an apocalyptic number.

21034025446 is a deficient number, since it is larger than the sum of its proper divisors (15028003130).

21034025446 is a wasteful number, since it uses less digits than its factorization.

21034025446 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 154143.

The product of its (nonzero) digits is 23040, while the sum is 31.

Adding to 21034025446 its reverse (64452043012), we get a palindrome (85486068458).

The spelling of 21034025446 in words is "twenty-one billion, thirty-four million, twenty-five thousand, four hundred forty-six".