20662074 has 16 divisors (see below), whose sum is σ = 45915840. Its totient is φ = 6887340.

The previous prime is 20662051. The next prime is 20662079. The reversal of 20662074 is 47026602.

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

It is not an unprimeable number, because it can be changed into a prime (20662079) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 191262 + ... + 191369.

It is an arithmetic number, because the mean of its divisors is an integer number (2869740).

Almost surely, 2^20662074 is an apocalyptic number.

20662074 is an abundant number, since it is smaller than the sum of its proper divisors (25253766).

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

20662074 is a wasteful number, since it uses less digits than its factorization.

20662074 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 382642 (or 382636 counting only the distinct ones).

The product of its (nonzero) digits is 4032, while the sum is 27.

The square root of 20662074 is about 4545.5554116081. Note that the first 3 decimals coincide. The cubic root of 20662074 is about 274.4045474204.

Adding to 20662074 its reverse (47026602), we get a palindrome (67688676).

The spelling of 20662074 in words is "twenty million, six hundred sixty-two thousand, seventy-four".