21729046602 has 16 divisors (see below), whose sum is σ = 43472610432. Its totient is φ = 7240596000.

The previous prime is 21729046541. The next prime is 21729046609. The reversal of 21729046602 is 20664092712.

It is not an unprimeable number, because it can be changed into a prime (21729046609) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 585378 + ... + 621389.

It is an arithmetic number, because the mean of its divisors is an integer number (2717038152).

Almost surely, 2^21729046602 is an apocalyptic number.

21729046602 is an abundant number, since it is smaller than the sum of its proper divisors (21743563830).

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

21729046602 is a wasteful number, since it uses less digits than its factorization.

21729046602 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1209773.

The product of its (nonzero) digits is 72576, while the sum is 39.

The spelling of 21729046602 in words is "twenty-one billion, seven hundred twenty-nine million, forty-six thousand, six hundred two".