20399644699302 has 32 divisors (see below), whose sum is σ = 44566193992320. Its totient is φ = 6173671864320.

The previous prime is 20399644699279. The next prime is 20399644699339.

20399644699302 is nontrivially palindromic in base 10.

It is a super-2 number, since 2×20399644699302² (a number of 27 digits) contains 22 as substring.

It is a Harshad number since it is a multiple of its sum of digits (66).

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 200915128 + ... + 201016635.

It is an arithmetic number, because the mean of its divisors is an integer number (1392693562260).

Almost surely, 2^{20399644699302} is an apocalyptic number.

20399644699302 is a gapful number since it is divisible by the number (22) formed by its first and last digit.

20399644699302 is an abundant number, since it is smaller than the sum of its proper divisors (24166549293018).

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

20399644699302 is a wasteful number, since it uses less digits than its factorization.

20399644699302 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 401932548.

The product of its (nonzero) digits is 136048896, while the sum is 66.

The spelling of 20399644699302 in words is "twenty trillion, three hundred ninety-nine billion, six hundred forty-four million, six hundred ninety-nine thousand, three hundred two".