212769018 has 160 divisors (see below), whose sum is σ = 611791488. Its totient is φ = 53654400.

The previous prime is 212769001. The next prime is 212769043. The reversal of 212769018 is 810967212.

It is an alternating number because its digits alternate between even and odd.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 79 ways as a sum of consecutive naturals, for example, 461308 + ... + 461768.

Almost surely, 2^212769018 is an apocalyptic number.

It is a practical number, because each smaller number is the sum of distinct divisors of 212769018, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (305895744).

212769018 is an abundant number, since it is smaller than the sum of its proper divisors (399022470).

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

212769018 is a wasteful number, since it uses less digits than its factorization.

212769018 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 530 (or 521 counting only the distinct ones).

The product of its (nonzero) digits is 12096, while the sum is 36.

The square root of 212769018 is about 14586.6040598900. The cubic root of 212769018 is about 596.9933081748.

The spelling of 212769018 in words is "two hundred twelve million, seven hundred sixty-nine thousand, eighteen".