211020004 has 48 divisors (see below), whose sum is σ = 421948800. Its totient is φ = 91535616.

The previous prime is 211020001. The next prime is 211020053. The reversal of 211020004 is 400020112.

211020004 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It is not an unprimeable number, because it can be changed into a prime (211020001) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 134577 + ... + 136135.

It is an arithmetic number, because the mean of its divisors is an integer number (8790600).

Almost surely, 2^211020004 is an apocalyptic number.

It is an amenable number.

211020004 is a deficient number, since it is larger than the sum of its proper divisors (210928796).

211020004 is a wasteful number, since it uses less digits than its factorization.

211020004 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1732 (or 1730 counting only the distinct ones).

The product of its (nonzero) digits is 16, while the sum is 10.

The square root of 211020004 is about 14526.5275960912. The cubic root of 211020004 is about 595.3529944081.

Adding to 211020004 its reverse (400020112), we get a palindrome (611040116).

The spelling of 211020004 in words is "two hundred eleven million, twenty thousand, four".