20750949 has 12 divisors (see below), whose sum is σ = 30482400. Its totient is φ = 13599144.

The previous prime is 20750927. The next prime is 20750953. The reversal of 20750949 is 94905702.

It is not a de Polignac number, because 20750949 - 2¹¹ = 20748901 is a prime.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (20750959) by changing a digit.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 19009 + ... + 20070.

It is an arithmetic number, because the mean of its divisors is an integer number (2540200).

Almost surely, 2^20750949 is an apocalyptic number.

It is an amenable number.

20750949 is a deficient number, since it is larger than the sum of its proper divisors (9731451).

20750949 is a wasteful number, since it uses less digits than its factorization.

20750949 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 39144 (or 39141 counting only the distinct ones).

The product of its (nonzero) digits is 22680, while the sum is 36.

The square root of 20750949 is about 4555.3209546639. The cubic root of 20750949 is about 274.7974221582.

The spelling of 20750949 in words is "twenty million, seven hundred fifty thousand, nine hundred forty-nine".