21919074290 has 16 divisors (see below), whose sum is σ = 41169739968. Its totient is φ = 8386428336.

The previous prime is 21919074271. The next prime is 21919074293. The reversal of 21919074290 is 9247091912.

It is not an unprimeable number, because it can be changed into a prime (21919074293) by changing a digit.

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, 47649932 + ... + 47650391.

It is an arithmetic number, because the mean of its divisors is an integer number (2573108748).

Almost surely, 2^21919074290 is an apocalyptic number.

21919074290 is a deficient number, since it is larger than the sum of its proper divisors (19250665678).

21919074290 is a wasteful number, since it uses less digits than its factorization.

21919074290 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 95300353.

The product of its (nonzero) digits is 81648, while the sum is 44.

The spelling of 21919074290 in words is "twenty-one billion, nine hundred nineteen million, seventy-four thousand, two hundred ninety".