20004153556 has 24 divisors (see below), whose sum is σ = 36145657856. Its totient is φ = 9676985760.

The previous prime is 20004153529. The next prime is 20004153557. The reversal of 20004153556 is 65535140002.

It is a Harshad number since it is a multiple of its sum of digits (31).

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (20004153557) 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, 533290 + ... + 569566.

Almost surely, 2^20004153556 is an apocalyptic number.

It is an amenable number.

20004153556 is a deficient number, since it is larger than the sum of its proper divisors (16141504300).

20004153556 is a wasteful number, since it uses less digits than its factorization.

20004153556 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 40759 (or 40757 counting only the distinct ones).

The product of its (nonzero) digits is 18000, while the sum is 31.

Adding to 20004153556 its reverse (65535140002), we get a palindrome (85539293558).

The spelling of 20004153556 in words is "twenty billion, four million, one hundred fifty-three thousand, five hundred fifty-six".