20749254 has 16 divisors (see below), whose sum is σ = 43682880. Its totient is φ = 6552360.

The previous prime is 20749241. The next prime is 20749259. The reversal of 20749254 is 45294702.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (20749259) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 90892 + ... + 91119.

It is an arithmetic number, because the mean of its divisors is an integer number (2730180).

Almost surely, 2^20749254 is an apocalyptic number.

20749254 is an abundant number, since it is smaller than the sum of its proper divisors (22933626).

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

20749254 is a wasteful number, since it uses less digits than its factorization.

20749254 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 182035.

The product of its (nonzero) digits is 20160, while the sum is 33.

The square root of 20749254 is about 4555.1349046982. The cubic root of 20749254 is about 274.7899398608.

The spelling of 20749254 in words is "twenty million, seven hundred forty-nine thousand, two hundred fifty-four".