20946140 has 12 divisors (see below), whose sum is σ = 43986936. Its totient is φ = 8378448.

The previous prime is 20946131. The next prime is 20946157. The reversal of 20946140 is 4164902.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 523634 + ... + 523673.

It is an arithmetic number, because the mean of its divisors is an integer number (3665578).

Almost surely, 2^20946140 is an apocalyptic number.

20946140 is a gapful number since it is divisible by the number (20) formed by its first and last digit.

It is an amenable number.

20946140 is an abundant number, since it is smaller than the sum of its proper divisors (23040796).

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

20946140 is a wasteful number, since it uses less digits than its factorization.

20946140 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1047316 (or 1047314 counting only the distinct ones).

The product of its (nonzero) digits is 1728, while the sum is 26.

The square root of 20946140 is about 4576.6953143070. The cubic root of 20946140 is about 275.6563495826.

The spelling of 20946140 in words is "twenty million, nine hundred forty-six thousand, one hundred forty".