21146120 has 32 divisors (see below), whose sum is σ = 47718720. Its totient is φ = 8433600.

The previous prime is 21146101. The next prime is 21146137. The reversal of 21146120 is 2164112.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 19595 + ... + 20645.

It is an arithmetic number, because the mean of its divisors is an integer number (1491210).

Almost surely, 2^21146120 is an apocalyptic number.

21146120 is a gapful number since it is divisible by the number (20) formed by its first and last digit.

It is an amenable number.

21146120 is an abundant number, since it is smaller than the sum of its proper divisors (26572600).

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

21146120 is a wasteful number, since it uses less digits than its factorization.

21146120 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1565 (or 1561 counting only the distinct ones).

The product of its (nonzero) digits is 96, while the sum is 17.

The square root of 21146120 is about 4598.4910568577. The cubic root of 21146120 is about 276.5308344372.

The spelling of 21146120 in words is "twenty-one million, one hundred forty-six thousand, one hundred twenty".