21470982120 has 128 divisors (see below), whose sum is σ = 81794246400. Its totient is φ = 4907651328.

The previous prime is 21470982119. The next prime is 21470982121. The reversal of 21470982120 is 2128907412.

It is an interprime number because it is at equal distance from previous prime (21470982119) and next prime (21470982121).

It is a super-2 number, since 2×21470982120² (a number of 21 digits) contains 22 as substring.

It is a Harshad number since it is a multiple of its sum of digits (36).

It is not an unprimeable number, because it can be changed into a prime (21470982121) by changing a digit.

It is a polite number, since it can be written in 31 ways as a sum of consecutive naturals, for example, 1412479 + ... + 1427598.

It is an arithmetic number, because the mean of its divisors is an integer number (639017550).

Almost surely, 2^21470982120 is an apocalyptic number.

21470982120 is a gapful number since it is divisible by the number (20) formed by its first and last digit.

It is an amenable number.

21470982120 is an abundant number, since it is smaller than the sum of its proper divisors (60323264280).

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

21470982120 is a wasteful number, since it uses less digits than its factorization.

21470982120 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 2840104 (or 2840094 counting only the distinct ones).

The product of its (nonzero) digits is 16128, while the sum is 36.

The spelling of 21470982120 in words is "twenty-one billion, four hundred seventy million, nine hundred eighty-two thousand, one hundred twenty".