21363396290 has 16 divisors (see below), whose sum is σ = 40716120312. Its totient is φ = 8042690304.

The previous prime is 21363396277. The next prime is 21363396323. The reversal of 21363396290 is 9269336312.

It can be written as a sum of positive squares in 4 ways, for example, as 15612752401 + 5750643889 = 124951^2 + 75833^2 .

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, 62833349 + ... + 62833688.

Almost surely, 2^21363396290 is an apocalyptic number.

21363396290 is a deficient number, since it is larger than the sum of its proper divisors (19352724022).

21363396290 is a wasteful number, since it uses less digits than its factorization.

21363396290 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 125667061.

The product of its (nonzero) digits is 314928, while the sum is 44.

The spelling of 21363396290 in words is "twenty-one billion, three hundred sixty-three million, three hundred ninety-six thousand, two hundred ninety".