20274720 has 48 divisors (see below), whose sum is σ = 63866880. Its totient is φ = 5406464.

The previous prime is 20274703. The next prime is 20274733. The reversal of 20274720 is 2747202.

It is a tau number, because it is divible by the number of its divisors (48).

It is a super-2 number, since 2×20274720² = 822128542156800, which contains 22 as substring.

It is a Harshad number since it is a multiple of its sum of digits (24).

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 7 ways as a sum of consecutive naturals, for example, 20640 + ... + 21599.

It is an arithmetic number, because the mean of its divisors is an integer number (1330560).

Almost surely, 2^20274720 is an apocalyptic number.

20274720 is a gapful number since it is divisible by the number (20) formed by its first and last digit.

It is an amenable number.

20274720 is an abundant number, since it is smaller than the sum of its proper divisors (43592160).

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

20274720 is a wasteful number, since it uses less digits than its factorization.

20274720 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 42257 (or 42249 counting only the distinct ones).

The product of its (nonzero) digits is 1568, while the sum is 24.

The square root of 20274720 is about 4502.7458289359. The cubic root of 20274720 is about 272.6789554809.

The spelling of 20274720 in words is "twenty million, two hundred seventy-four thousand, seven hundred twenty".