205402367420 has 24 divisors (see below), whose sum is σ = 445259326848. Its totient is φ = 79510593600.

The previous prime is 205402367419. The next prime is 205402367431. The reversal of 205402367420 is 24763204502.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 165646451 + ... + 165647690.

It is an arithmetic number, because the mean of its divisors is an integer number (18552471952).

Almost surely, 2^205402367420 is an apocalyptic number.

205402367420 is a gapful number since it is divisible by the number (20) formed by its first and last digit.

It is an amenable number.

205402367420 is an abundant number, since it is smaller than the sum of its proper divisors (239856959428).

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

205402367420 is a wasteful number, since it uses less digits than its factorization.

205402367420 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 331294181 (or 331294179 counting only the distinct ones).

The product of its (nonzero) digits is 80640, while the sum is 35.

The spelling of 205402367420 in words is "two hundred five billion, four hundred two million, three hundred sixty-seven thousand, four hundred twenty".