21400301982 has 32 divisors (see below), whose sum is σ = 44252881920. Its totient is φ = 6892133760.

The previous prime is 21400301957. The next prime is 21400301983. The reversal of 21400301982 is 28910300412.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (21400301983) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 22198 + ... + 208070.

It is an arithmetic number, because the mean of its divisors is an integer number (1382902560).

Almost surely, 2^21400301982 is an apocalyptic number.

21400301982 is an abundant number, since it is smaller than the sum of its proper divisors (22852579938).

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

21400301982 is a wasteful number, since it uses less digits than its factorization.

21400301982 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 186528.

The product of its (nonzero) digits is 3456, while the sum is 30.

The spelling of 21400301982 in words is "twenty-one billion, four hundred million, three hundred one thousand, nine hundred eighty-two".