20725350 has 48 divisors (see below), whose sum is σ = 51706512. Its totient is φ = 5493760.

The previous prime is 20725339. The next prime is 20725361. The reversal of 20725350 is 5352702.

It is an interprime number because it is at equal distance from previous prime (20725339) and next prime (20725361).

It is a Curzon number.

It is a self number, because there is not a number n which added to its sum of digits gives 20725350.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 23 ways as a sum of consecutive naturals, for example, 34654 + ... + 35246.

It is an arithmetic number, because the mean of its divisors is an integer number (1077219).

Almost surely, 2^20725350 is an apocalyptic number.

It is a practical number, because each smaller number is the sum of distinct divisors of 20725350, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (25853256).

20725350 is an abundant number, since it is smaller than the sum of its proper divisors (30981162).

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

20725350 is a wasteful number, since it uses less digits than its factorization.

20725350 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 841 (or 836 counting only the distinct ones).

The product of its (nonzero) digits is 2100, while the sum is 24.

The square root of 20725350 is about 4552.5102965287. The cubic root of 20725350 is about 274.6843761819.

The spelling of 20725350 in words is "twenty million, seven hundred twenty-five thousand, three hundred fifty".