209927364020 has 96 divisors (see below), whose sum is σ = 493307297280. Its totient is φ = 74385930240.

The previous prime is 209927364011. The next prime is 209927364037. The reversal of 209927364020 is 20463729902.

It is a Harshad number since it is a multiple of its sum of digits (44).

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 31 ways as a sum of consecutive naturals, for example, 2323532 + ... + 2412188.

It is an arithmetic number, because the mean of its divisors is an integer number (5138617680).

Almost surely, 2^209927364020 is an apocalyptic number.

209927364020 is a gapful number since it is divisible by the number (20) formed by its first and last digit.

It is an amenable number.

It is a practical number, because each smaller number is the sum of distinct divisors of 209927364020, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (246653648640).

209927364020 is an abundant number, since it is smaller than the sum of its proper divisors (283379933260).

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

209927364020 is a wasteful number, since it uses less digits than its factorization.

209927364020 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 88953 (or 88951 counting only the distinct ones).

The product of its (nonzero) digits is 326592, while the sum is 44.

The spelling of 209927364020 in words is "two hundred nine billion, nine hundred twenty-seven million, three hundred sixty-four thousand, twenty".