21471774140 has 48 divisors (see below), whose sum is σ = 46337983104. Its totient is φ = 8351424000.

The previous prime is 21471774119. The next prime is 21471774143. The reversal of 21471774140 is 4147717412.

It is a super-2 number, since 2×21471774140² (a number of 21 digits) contains 22 as substring.

It is a junction number, because it is equal to n+sod(n) for n = 21471774094 and 21471774103.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (21471774143) 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, 1324685 + ... + 1340795.

It is an arithmetic number, because the mean of its divisors is an integer number (965374648).

Almost surely, 2^21471774140 is an apocalyptic number.

21471774140 is a gapful number since it is divisible by the number (20) formed by its first and last digit.

It is an amenable number.

21471774140 is an abundant number, since it is smaller than the sum of its proper divisors (24866208964).

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

21471774140 is a wasteful number, since it uses less digits than its factorization.

21471774140 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 17958 (or 17956 counting only the distinct ones).

The product of its (nonzero) digits is 43904, while the sum is 38.

The spelling of 21471774140 in words is "twenty-one billion, four hundred seventy-one million, seven hundred seventy-four thousand, one hundred forty".