20153950 has 12 divisors (see below), whose sum is σ = 37486440. Its totient is φ = 8061560.

The previous prime is 20153941. The next prime is 20153951. The reversal of 20153950 is 5935102.

It is a Harshad number since it is a multiple of its sum of digits (25).

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (20153951) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 5 ways as a sum of consecutive naturals, for example, 201490 + ... + 201589.

It is an arithmetic number, because the mean of its divisors is an integer number (3123870).

Almost surely, 2^20153950 is an apocalyptic number.

20153950 is a deficient number, since it is larger than the sum of its proper divisors (17332490).

20153950 is a wasteful number, since it uses less digits than its factorization.

20153950 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 403091 (or 403086 counting only the distinct ones).

The product of its (nonzero) digits is 1350, while the sum is 25.

The square root of 20153950 is about 4489.3150925280. The cubic root of 20153950 is about 272.1364565457.

The spelling of 20153950 in words is "twenty million, one hundred fifty-three thousand, nine hundred fifty".