20941740 has 144 divisors (see below), whose sum is σ = 68490240. Its totient is φ = 5365440.

The previous prime is 20941703. The next prime is 20941757. The reversal of 20941740 is 4714902.

It is a happy number.

20941740 is a `hidden beast` number, since 209 + 417 + 40 = 666.

It is a hoax number, since the sum of its digits (27) coincides with the sum of the digits of its distinct prime factors.

It is a Harshad number since it is a multiple of its sum of digits (27).

It is an unprimeable number.

It is a polite number, since it can be written in 47 ways as a sum of consecutive naturals, for example, 150591 + ... + 150729.

Almost surely, 2^20941740 is an apocalyptic number.

20941740 is a gapful number since it is divisible by the number (20) formed by its first and last digit.

It is an amenable number.

It is a practical number, because each smaller number is the sum of distinct divisors of 20941740, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (34245120).

20941740 is an abundant number, since it is smaller than the sum of its proper divisors (47548500).

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

20941740 is a wasteful number, since it uses less digits than its factorization.

20941740 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 194 (or 180 counting only the distinct ones).

The product of its (nonzero) digits is 2016, while the sum is 27.

The square root of 20941740 is about 4576.2145928704. The cubic root of 20941740 is about 275.6370465372.

The spelling of 20941740 in words is "twenty million, nine hundred forty-one thousand, seven hundred forty".