20745546 has 8 divisors (see below), whose sum is σ = 41491104. Its totient is φ = 6915180.

The previous prime is 20745523. The next prime is 20745547. The reversal of 20745546 is 64554702.

It is a sphenic number, since it is the product of 3 distinct primes.

20745546 is an admirable number.

It is not an unprimeable number, because it can be changed into a prime (20745547) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 1728790 + ... + 1728801.

It is an arithmetic number, because the mean of its divisors is an integer number (5186388).

Almost surely, 2^20745546 is an apocalyptic number.

20745546 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.

20745546 is a wasteful number, since it uses less digits than its factorization.

20745546 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 3457596.

The product of its (nonzero) digits is 33600, while the sum is 33.

The square root of 20745546 is about 4554.7278733202. The cubic root of 20745546 is about 274.7735700868.

It can be divided in two parts, 207 and 45546, that added together give a triangular number (45753 = T₃₀₂).

The spelling of 20745546 in words is "twenty million, seven hundred forty-five thousand, five hundred forty-six".