21836400202 has 16 divisors (see below), whose sum is σ = 33317568000. Its totient is φ = 10730631040.

The previous prime is 21836400181. The next prime is 21836400233. The reversal of 21836400202 is 20200463812.

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, 547002 + ... + 585562.

It is an arithmetic number, because the mean of its divisors is an integer number (2082348000).

Almost surely, 2^21836400202 is an apocalyptic number.

21836400202 is a deficient number, since it is larger than the sum of its proper divisors (11481167798).

21836400202 is a wasteful number, since it uses less digits than its factorization.

21836400202 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 43421.

The product of its (nonzero) digits is 4608, while the sum is 28.

The spelling of 21836400202 in words is "twenty-one billion, eight hundred thirty-six million, four hundred thousand, two hundred two".