20146445 has 32 divisors (see below), whose sum is σ = 28926720. Its totient is φ = 13296640.

The previous prime is 20146433. The next prime is 20146453. The reversal of 20146445 is 54464102.

It is not a de Polignac number, because 20146445 - 2⁶ = 20146381 is a prime.

It is a super-2 number, since 2×20146445² = 811758492276050, which contains 22 as substring.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 31 ways as a sum of consecutive naturals, for example, 26744 + ... + 27486.

It is an arithmetic number, because the mean of its divisors is an integer number (903960).

Almost surely, 2^20146445 is an apocalyptic number.

It is an amenable number.

20146445 is a deficient number, since it is larger than the sum of its proper divisors (8780275).

20146445 is a wasteful number, since it uses less digits than its factorization.

20146445 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 805.

The product of its (nonzero) digits is 3840, while the sum is 26.

The square root of 20146445 is about 4488.4791410900. The cubic root of 20146445 is about 272.1026726360.

The spelling of 20146445 in words is "twenty million, one hundred forty-six thousand, four hundred forty-five".