4020250905 has 48 divisors (see below), whose sum is σ = 7640702784. Its totient is φ = 1939271040.

The previous prime is 4020250879. The next prime is 4020250909. The reversal of 4020250905 is 5090520204.

4020250905 is a `hidden beast` number, since 402 + 0 + 250 + 9 + 0 + 5 = 666.

It is not a de Polignac number, because 4020250905 - 2¹⁴ = 4020234521 is a prime.

It is a Curzon number.

It is not an unprimeable number, because it can be changed into a prime (4020250909) by changing a digit.

It is a polite number, since it can be written in 47 ways as a sum of consecutive naturals, for example, 76902 + ... + 118128.

It is an arithmetic number, because the mean of its divisors is an integer number (159181308).

Almost surely, 2^4020250905 is an apocalyptic number.

4020250905 is a gapful number since it is divisible by the number (45) formed by its first and last digit.

It is an amenable number.

4020250905 is a deficient number, since it is larger than the sum of its proper divisors (3620451879).

4020250905 is a wasteful number, since it uses less digits than its factorization.

4020250905 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 41446 (or 41443 counting only the distinct ones).

The product of its (nonzero) digits is 3600, while the sum is 27.

The square root of 4020250905 is about 63405.4485434809. The cubic root of 4020250905 is about 1590.0754028558.

The spelling of 4020250905 in words is "four billion, twenty million, two hundred fifty thousand, nine hundred five".