21999059066 has 64 divisors (see below), whose sum is σ = 37356577920. Its totient is φ = 9654681600.

The previous prime is 21999059063. The next prime is 21999059101. The reversal of 21999059066 is 66095099912.

It is not an unprimeable number, because it can be changed into a prime (21999059063) by changing a digit.

It is a polite number, since it can be written in 31 ways as a sum of consecutive naturals, for example, 12591605 + ... + 12593351.

It is an arithmetic number, because the mean of its divisors is an integer number (583696530).

Almost surely, 2^21999059066 is an apocalyptic number.

21999059066 is a deficient number, since it is larger than the sum of its proper divisors (15357518854).

21999059066 is a wasteful number, since it uses less digits than its factorization.

21999059066 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 2079.

The product of its (nonzero) digits is 2361960, while the sum is 56.

The spelling of 21999059066 in words is "twenty-one billion, nine hundred ninety-nine million, fifty-nine thousand, sixty-six".