21400302012 has 48 divisors (see below), whose sum is σ = 50875171200. Its totient is φ = 7000141888.

The previous prime is 21400301983. The next prime is 21400302023. The reversal of 21400302012 is 21020300412.

It is a super-2 number, since 2×21400302012² (a number of 21 digits) contains 22 as substring.

It is a junction number, because it is equal to n+sod(n) for n = 21400301982 and 21400302000.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 76303 + ... + 220505.

It is an arithmetic number, because the mean of its divisors is an integer number (1059899400).

Almost surely, 2^21400302012 is an apocalyptic number.

It is an amenable number.

21400302012 is an abundant number, since it is smaller than the sum of its proper divisors (29474869188).

It is a pseudoperfect number, because it is the sum of a subset of its proper divisors.

21400302012 is a wasteful number, since it uses less digits than its factorization.

21400302012 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 144442 (or 144440 counting only the distinct ones).

The product of its (nonzero) digits is 96, while the sum is 15.

Adding to 21400302012 its reverse (21020300412), we get a palindrome (42420602424).

The spelling of 21400302012 in words is "twenty-one billion, four hundred million, three hundred two thousand, twelve".