20545950 has 24 divisors (see below), whose sum is σ = 50954328. Its totient is φ = 5478880.

The previous prime is 20545939. The next prime is 20545957. The reversal of 20545950 is 5954502.

It is a happy number.

It is a super-2 number, since 2×20545950² = 844272122805000, which contains 22 as substring.

It is a Harshad number since it is a multiple of its sum of digits (30).

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (20545957) 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, 68337 + ... + 68636.

It is an arithmetic number, because the mean of its divisors is an integer number (2123097).

Almost surely, 2^20545950 is an apocalyptic number.

20545950 is an abundant number, since it is smaller than the sum of its proper divisors (30408378).

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

20545950 is a wasteful number, since it uses less digits than its factorization.

20545950 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 136988 (or 136983 counting only the distinct ones).

The product of its (nonzero) digits is 9000, while the sum is 30.

The square root of 20545950 is about 4532.7640573937. The cubic root of 20545950 is about 273.8895162568.

The spelling of 20545950 in words is "twenty million, five hundred forty-five thousand, nine hundred fifty".