20667072 has 28 divisors (see below), whose sum is σ = 54682136. Its totient is φ = 6888960.

The previous prime is 20667067. The next prime is 20667107. The reversal of 20667072 is 27076602.

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, 53629 + ... + 54012.

Almost surely, 2^20667072 is an apocalyptic number.

It is an amenable number.

20667072 is an abundant number, since it is smaller than the sum of its proper divisors (34015064).

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

20667072 is a wasteful number, since it uses less digits than its factorization.

20667072 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 107656 (or 107646 counting only the distinct ones).

The product of its (nonzero) digits is 7056, while the sum is 30.

The square root of 20667072 is about 4546.1051461663. The cubic root of 20667072 is about 274.4266711008.

The spelling of 20667072 in words is "twenty million, six hundred sixty-seven thousand, seventy-two".