1864010020 has 12 divisors (see below), whose sum is σ = 3914421084. Its totient is φ = 745604000.

The previous prime is 1864010017. The next prime is 1864010021. The reversal of 1864010020 is 200104681.

It can be written as a sum of positive squares in 2 ways, for example, as 392673856 + 1471336164 = 19816^2 + 38358^2 .

It is a junction number, because it is equal to n+sod(n) for n = 1864009973 and 1864010000.

It is not an unprimeable number, because it can be changed into a prime (1864010021) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 46600231 + ... + 46600270.

It is an arithmetic number, because the mean of its divisors is an integer number (326201757).

Almost surely, 2^1864010020 is an apocalyptic number.

1864010020 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

It is an amenable number.

1864010020 is an abundant number, since it is smaller than the sum of its proper divisors (2050411064).

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

1864010020 is a wasteful number, since it uses less digits than its factorization.

1864010020 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 93200510 (or 93200508 counting only the distinct ones).

The product of its (nonzero) digits is 384, while the sum is 22.

The square root of 1864010020 is about 43174.1823315740. The cubic root of 1864010020 is about 1230.6921039349.

The spelling of 1864010020 in words is "one billion, eight hundred sixty-four million, ten thousand, twenty".