213620770404 has 36 divisors (see below), whose sum is σ = 540455086080. Its totient is φ = 71145044400.

The previous prime is 213620770403. The next prime is 213620770411. The reversal of 213620770404 is 404077026312.

213620770404 is a `hidden beast` number, since 21 + 3 + 620 + 7 + 7 + 0 + 4 + 0 + 4 = 666.

It is a tau number, because it is divible by the number of its divisors (36).

It is a Harshad number since it is a multiple of its sum of digits (36).

It is not an unprimeable number, because it can be changed into a prime (213620770403) by changing a digit.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 2536284 + ... + 2619155.

It is an arithmetic number, because the mean of its divisors is an integer number (15012641280).

Almost surely, 2^213620770404 is an apocalyptic number.

It is an amenable number.

213620770404 is an abundant number, since it is smaller than the sum of its proper divisors (326834315676).

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

213620770404 is a wasteful number, since it uses less digits than its factorization.

213620770404 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 5156600 (or 5156595 counting only the distinct ones).

The product of its (nonzero) digits is 56448, while the sum is 36.

Adding to 213620770404 its reverse (404077026312), we get a palindrome (617697796716).

The spelling of 213620770404 in words is "two hundred thirteen billion, six hundred twenty million, seven hundred seventy thousand, four hundred four".