21050511346 has 16 divisors (see below), whose sum is σ = 32359330080. Its totient is φ = 10264281120.

The previous prime is 21050511299. The next prime is 21050511347. The reversal of 21050511346 is 64311505012.

It is not an unprimeable number, because it can be changed into a prime (21050511347) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 150265 + ... + 254323.

It is an arithmetic number, because the mean of its divisors is an integer number (2022458130).

Almost surely, 2^21050511346 is an apocalyptic number.

21050511346 is a deficient number, since it is larger than the sum of its proper divisors (11308818734).

21050511346 is a wasteful number, since it uses less digits than its factorization.

21050511346 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 106569.

The product of its (nonzero) digits is 3600, while the sum is 28.

The spelling of 21050511346 in words is "twenty-one billion, fifty million, five hundred eleven thousand, three hundred forty-six".