20356645336402 has 16 divisors (see below), whose sum is σ = 30588598166400. Its totient is φ = 10160456283760.

The previous prime is 20356645336399. The next prime is 20356645336409. The reversal of 20356645336402 is 20463354665302.

It is a super-3 number, since 3×20356645336402³ (a number of 41 digits) contains 333 as substring.

It is not an unprimeable number, because it can be changed into a prime (20356645336409) 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, 1359249 + ... + 6523867.

It is an arithmetic number, because the mean of its divisors is an integer number (1911787385400).

Almost surely, 2^{20356645336402} is an apocalyptic number.

20356645336402 is a deficient number, since it is larger than the sum of its proper divisors (10231952829998).

20356645336402 is a wasteful number, since it uses less digits than its factorization.

20356645336402 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 5168081.

The product of its (nonzero) digits is 9331200, while the sum is 49.

The spelling of 20356645336402 in words is "twenty trillion, three hundred fifty-six billion, six hundred forty-five million, three hundred thirty-six thousand, four hundred two".