21887703256940 has 24 divisors (see below), whose sum is σ = 45967517109360. Its totient is φ = 8754445060928.

The previous prime is 21887703256927. The next prime is 21887703256949. The reversal of 21887703256940 is 4965230778812.

It is a super-3 number, since 3×21887703256940³ (a number of 41 digits) contains 333 as substring.

It is not an unprimeable number, because it can be changed into a prime (21887703256949) 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, 39482975 + ... + 40033494.

It is an arithmetic number, because the mean of its divisors is an integer number (1915313212890).

It is a 1-persistent number, because it is pandigital, but 2⋅21887703256940 = 43775406513880 is not.

Almost surely, 2^{21887703256940} is an apocalyptic number.

21887703256940 is a gapful number since it is divisible by the number (20) formed by its first and last digit.

It is an amenable number.

21887703256940 is an abundant number, since it is smaller than the sum of its proper divisors (24079813852420).

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

21887703256940 is a wasteful number, since it uses less digits than its factorization.

21887703256940 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 79530241 (or 79530239 counting only the distinct ones).

The product of its (nonzero) digits is 40642560, while the sum is 62.

The spelling of 21887703256940 in words is "twenty-one trillion, eight hundred eighty-seven billion, seven hundred three million, two hundred fifty-six thousand, nine hundred forty".