20966428 has 12 divisors (see below), whose sum is σ = 41932912. Its totient is φ = 8985600.

The previous prime is 20966411. The next prime is 20966431. The reversal of 20966428 is 82466902.

20966428 is an admirable number.

It is a super-2 number, since 2×20966428² = 879182206158368, which contains 22 as substring.

It is a hoax number, since the sum of its digits (37) coincides with the sum of the digits of its distinct prime factors.

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, 374373 + ... + 374428.

Almost surely, 2^20966428 is an apocalyptic number.

20966428 is a gapful number since it is divisible by the number (28) formed by its first and last digit.

It is an amenable number.

20966428 is a primitive abundant number, since it is smaller than the sum of its proper divisors, none of which is abundant.

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

20966428 is a wasteful number, since it uses less digits than its factorization.

20966428 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 748812 (or 748810 counting only the distinct ones).

The product of its (nonzero) digits is 41472, while the sum is 37.

The square root of 20966428 is about 4578.9112242978. The cubic root of 20966428 is about 275.7453192192.

The spelling of 20966428 in words is "twenty million, nine hundred sixty-six thousand, four hundred twenty-eight".