20023101550 has 24 divisors (see below), whose sum is σ = 39203127000. Its totient is φ = 7587701280.

The previous prime is 20023101529. The next prime is 20023101583. The reversal of 20023101550 is 5510132002.

It is a super-2 number, since 2×20023101550² (a number of 21 digits) contains 22 as substring.

It is a Harshad number since it is a multiple of its sum of digits (19).

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 10537525 + ... + 10539424.

It is an arithmetic number, because the mean of its divisors is an integer number (1633463625).

Almost surely, 2^20023101550 is an apocalyptic number.

20023101550 is a deficient number, since it is larger than the sum of its proper divisors (19180025450).

20023101550 is a wasteful number, since it uses less digits than its factorization.

20023101550 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 21076980 (or 21076975 counting only the distinct ones).

The product of its (nonzero) digits is 300, while the sum is 19.

Adding to 20023101550 its reverse (5510132002), we get a palindrome (25533233552).

The spelling of 20023101550 in words is "twenty billion, twenty-three million, one hundred one thousand, five hundred fifty".