21400701050 has 36 divisors (see below), whose sum is σ = 40316134446. Its totient is φ = 8451799200.

The previous prime is 21400701043. The next prime is 21400701059. The reversal of 21400701050 is 5010700412.

It can be written as a sum of positive squares in 3 ways, for example, as 12959317921 + 8441383129 = 113839^2 + 91877^2 .

It is a super-2 number, since 2×21400701050² (a number of 21 digits) contains 22 as substring.

It is not an unprimeable number, because it can be changed into a prime (21400701059) 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 17 ways as a sum of consecutive naturals, for example, 277760 + ... + 346340.

Almost surely, 2^21400701050 is an apocalyptic number.

21400701050 is a deficient number, since it is larger than the sum of its proper divisors (18915433396).

21400701050 is an equidigital number, since it uses as much as digits as its factorization.

21400701050 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 68751 (or 68667 counting only the distinct ones).

The product of its (nonzero) digits is 280, while the sum is 20.

The spelling of 21400701050 in words is "twenty-one billion, four hundred million, seven hundred one thousand, fifty".