20946750 has 64 divisors (see below), whose sum is σ = 57058560. Its totient is φ = 5076000.

The previous prime is 20946749. The next prime is 20946781. The reversal of 20946750 is 5764902.

It is a Harshad number since it is a multiple of its sum of digits (33).

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 31 ways as a sum of consecutive naturals, for example, 6981 + ... + 9519.

It is an arithmetic number, because the mean of its divisors is an integer number (891540).

Almost surely, 2^20946750 is an apocalyptic number.

It is a practical number, because each smaller number is the sum of distinct divisors of 20946750, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (28529280).

20946750 is an abundant number, since it is smaller than the sum of its proper divisors (36111810).

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

20946750 is a wasteful number, since it uses less digits than its factorization.

20946750 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 2570 (or 2560 counting only the distinct ones).

The product of its (nonzero) digits is 15120, while the sum is 33.

The square root of 20946750 is about 4576.7619557936. The cubic root of 20946750 is about 275.6590254733.

The spelling of 20946750 in words is "twenty million, nine hundred forty-six thousand, seven hundred fifty".