20747650 has 96 divisors (see below), whose sum is σ = 51103872. Its totient is φ = 6067200.

The previous prime is 20747647. The next prime is 20747653. The reversal of 20747650 is 5674702.

It is an interprime number because it is at equal distance from previous prime (20747647) and next prime (20747653).

It is not an unprimeable number, because it can be changed into a prime (20747653) 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 47 ways as a sum of consecutive naturals, for example, 65292 + ... + 65608.

It is an arithmetic number, because the mean of its divisors is an integer number (532332).

Almost surely, 2^20747650 is an apocalyptic number.

20747650 is an abundant number, since it is smaller than the sum of its proper divisors (30356222).

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

20747650 is a wasteful number, since it uses less digits than its factorization.

20747650 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 364 (or 359 counting only the distinct ones).

The product of its (nonzero) digits is 11760, while the sum is 31.

The square root of 20747650 is about 4554.9588362575. The cubic root of 20747650 is about 274.7828588927.

The spelling of 20747650 in words is "twenty million, seven hundred forty-seven thousand, six hundred fifty".