20402021104 has 20 divisors (see below), whose sum is σ = 39550374864. Its totient is φ = 10195472768.

The previous prime is 20402021099. The next prime is 20402021117. The reversal of 20402021104 is 40112020402.

It is a super-2 number, since 2×20402021104² (a number of 21 digits) contains 22 as substring.

It is a Harshad number since it is a multiple of its sum of digits (16).

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 315637 + ... + 374740.

Almost surely, 2^20402021104 is an apocalyptic number.

It is an amenable number.

20402021104 is a deficient number, since it is larger than the sum of its proper divisors (19148353760).

20402021104 is a wasteful number, since it uses less digits than its factorization.

20402021104 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 692232 (or 692226 counting only the distinct ones).

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

Adding to 20402021104 its reverse (40112020402), we get a palindrome (60514041506).

The spelling of 20402021104 in words is "twenty billion, four hundred two million, twenty-one thousand, one hundred four".