20401340102 has 64 divisors (see below), whose sum is σ = 36819062784. Its totient is φ = 8354586240.

The previous prime is 20401340087. The next prime is 20401340107. The reversal of 20401340102 is 20104310402.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (20401340107) by changing a digit.

It is a polite number, since it can be written in 31 ways as a sum of consecutive naturals, for example, 5334563 + ... + 5338385.

It is an arithmetic number, because the mean of its divisors is an integer number (575297856).

Almost surely, 2^20401340102 is an apocalyptic number.

20401340102 is a gapful number since it is divisible by the number (22) formed by its first and last digit.

20401340102 is a deficient number, since it is larger than the sum of its proper divisors (16417722682).

20401340102 is a wasteful number, since it uses less digits than its factorization.

20401340102 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 4293.

The product of its (nonzero) digits is 192, while the sum is 17.

Adding to 20401340102 its reverse (20104310402), we get a palindrome (40505650504).

The spelling of 20401340102 in words is "twenty billion, four hundred one million, three hundred forty thousand, one hundred two".