209466926634 has 48 divisors (see below), whose sum is σ = 505306876608. Its totient is φ = 56697810624.

The previous prime is 209466926629. The next prime is 209466926681. The reversal of 209466926634 is 436629664902.

It is a Harshad number since it is a multiple of its sum of digits (57).

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, 6892467 + ... + 6922790.

It is an arithmetic number, because the mean of its divisors is an integer number (10527226596).

Almost surely, 2^209466926634 is an apocalyptic number.

209466926634 is an abundant number, since it is smaller than the sum of its proper divisors (295839949974).

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

209466926634 is a wasteful number, since it uses less digits than its factorization.

209466926634 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 13815307 (or 13815288 counting only the distinct ones).

The product of its (nonzero) digits is 20155392, while the sum is 57.

The spelling of 209466926634 in words is "two hundred nine billion, four hundred sixty-six million, nine hundred twenty-six thousand, six hundred thirty-four".