20423451542152 has 32 divisors (see below), whose sum is σ = 38396198292480. Its totient is φ = 10184492949120.

The previous prime is 20423451542147. The next prime is 20423451542167. The reversal of 20423451542152 is 25124515432402.

It is a super-2 number, since 2×20423451542152² (a number of 27 digits) contains 22 as substring.

It is an unprimeable number.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 4194148 + ... + 7644460.

It is an arithmetic number, because the mean of its divisors is an integer number (1199881196640).

Almost surely, 2^{20423451542152} is an apocalyptic number.

It is an amenable number.

20423451542152 is a deficient number, since it is larger than the sum of its proper divisors (17972746750328).

20423451542152 is a wasteful number, since it uses less digits than its factorization.

20423451542152 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 3452293 (or 3452289 counting only the distinct ones).

The product of its (nonzero) digits is 384000, while the sum is 40.

Adding to 20423451542152 its reverse (25124515432402), we get a palindrome (45547966974554).

The spelling of 20423451542152 in words is "twenty trillion, four hundred twenty-three billion, four hundred fifty-one million, five hundred forty-two thousand, one hundred fifty-two".