204120021402 has 48 divisors (see below), whose sum is σ = 484536282048. Its totient is φ = 61589067840.

The previous prime is 204120021373. The next prime is 204120021439.

204120021402 is a `hidden beast` number, since 2 + 0 + 41 + 200 + 21 + 402 = 666.

204120021402 is nontrivially palindromic in base 10.

It is a Harshad number since it is a multiple of its sum of digits (18).

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 23 ways as a sum of consecutive naturals, for example, 2166118 + ... + 2258385.

It is an arithmetic number, because the mean of its divisors is an integer number (10094505876).

Almost surely, 2^204120021402 is an apocalyptic number.

204120021402 is a gapful number since it is divisible by the number (22) formed by its first and last digit.

204120021402 is an abundant number, since it is smaller than the sum of its proper divisors (280416260646).

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

204120021402 is a wasteful number, since it uses less digits than its factorization.

204120021402 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 4424755 (or 4424752 counting only the distinct ones).

The product of its (nonzero) digits is 256, while the sum is 18.

It can be divided in two parts, 2041200 and 21402, that added together give a palindrome (2062602).

The spelling of 204120021402 in words is "two hundred four billion, one hundred twenty million, twenty-one thousand, four hundred two".