20269620 has 72 divisors (see below), whose sum is σ = 70272384. Its totient is φ = 4632768.

The previous prime is 20269619. The next prime is 20269633. The reversal of 20269620 is 2696202.

It is a congruent number.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (11) of ones.

It is a polite number, since it can be written in 23 ways as a sum of consecutive naturals, for example, 6784 + ... + 9303.

Almost surely, 2^20269620 is an apocalyptic number.

20269620 is a gapful number since it is divisible by the number (20) formed by its first and last digit.

It is an amenable number.

20269620 is an abundant number, since it is smaller than the sum of its proper divisors (50002764).

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

20269620 is a wasteful number, since it uses less digits than its factorization.

20269620 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 16109 (or 16104 counting only the distinct ones).

The product of its (nonzero) digits is 2592, while the sum is 27.

The square root of 20269620 is about 4502.1794722112. The cubic root of 20269620 is about 272.6560899075.

The spelling of 20269620 in words is "twenty million, two hundred sixty-nine thousand, six hundred twenty".