20269720 has 16 divisors (see below), whose sum is σ = 45606960. Its totient is φ = 8107872.

The previous prime is 20269687. The next prime is 20269721. The reversal of 20269720 is 2796202.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (20269721) by changing a digit.

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 3 ways as a sum of consecutive naturals, for example, 253332 + ... + 253411.

It is an arithmetic number, because the mean of its divisors is an integer number (2850435).

Almost surely, 2^20269720 is an apocalyptic number.

20269720 is a gapful number since it is divisible by the number (20) formed by its first and last digit.

It is an amenable number.

20269720 is an abundant number, since it is smaller than the sum of its proper divisors (25337240).

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

20269720 is a wasteful number, since it uses less digits than its factorization.

20269720 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 506754 (or 506750 counting only the distinct ones).

The product of its (nonzero) digits is 3024, while the sum is 28.

The square root of 20269720 is about 4502.1905779298. The cubic root of 20269720 is about 272.6565382889.

The spelling of 20269720 in words is "twenty million, two hundred sixty-nine thousand, seven hundred twenty".