20401042102 has 36 divisors (see below), whose sum is σ = 37569975660. Its totient is φ = 8283115512.

The previous prime is 20401042073. The next prime is 20401042111. The reversal of 20401042102 is 20124010402.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 17 ways as a sum of consecutive naturals, for example, 252952 + ... + 323707.

It is an arithmetic number, because the mean of its divisors is an integer number (1043610435).

Almost surely, 2^20401042102 is an apocalyptic number.

20401042102 is a deficient number, since it is larger than the sum of its proper divisors (17168933558).

20401042102 is a wasteful number, since it uses less digits than its factorization.

20401042102 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 576713 (or 576687 counting only the distinct ones).

The product of its (nonzero) digits is 128, while the sum is 16.

Adding to 20401042102 its reverse (20124010402), we get a palindrome (40525052504).

The spelling of 20401042102 in words is "twenty billion, four hundred one million, forty-two thousand, one hundred two".