210401020404 has 72 divisors (see below), whose sum is σ = 592770709440. Its totient is φ = 62534045952.

The previous prime is 210401020397. The next prime is 210401020411. The reversal of 210401020404 is 404020104012.

210401020404 is a `hidden beast` number, since 210 + 40 + 10 + 2 + 0 + 404 = 666.

It is an interprime number because it is at equal distance from previous prime (210401020397) and next prime (210401020411).

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

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 23 ways as a sum of consecutive naturals, for example, 9035544 + ... + 9058799.

It is an arithmetic number, because the mean of its divisors is an integer number (8232926520).

Almost surely, 2^210401020404 is an apocalyptic number.

It is an amenable number.

210401020404 is an abundant number, since it is smaller than the sum of its proper divisors (382369689036).

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

210401020404 is a wasteful number, since it uses less digits than its factorization.

210401020404 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 18094389 (or 18094384 counting only the distinct ones).

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

Adding to 210401020404 its reverse (404020104012), we get a palindrome (614421124416).

The spelling of 210401020404 in words is "two hundred ten billion, four hundred one million, twenty thousand, four hundred four".