20155450 has 24 divisors (see below), whose sum is σ = 42845472. Its totient is φ = 6910320.

The previous prime is 20155441. The next prime is 20155481. The reversal of 20155450 is 5455102.

It is an unprimeable number.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 28444 + ... + 29143.

It is an arithmetic number, because the mean of its divisors is an integer number (1785228).

Almost surely, 2^20155450 is an apocalyptic number.

20155450 is an abundant number, since it is smaller than the sum of its proper divisors (22690022).

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

20155450 is a wasteful number, since it uses less digits than its factorization.

20155450 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 57606 (or 57601 counting only the distinct ones).

The product of its (nonzero) digits is 1000, while the sum is 22.

The square root of 20155450 is about 4489.4821527655. The cubic root of 20155450 is about 272.1432078204.

The spelling of 20155450 in words is "twenty million, one hundred fifty-five thousand, four hundred fifty".