20377400345 has 32 divisors (see below), whose sum is σ = 26591431680. Its totient is φ = 14933790720.

The previous prime is 20377400291. The next prime is 20377400389. The reversal of 20377400345 is 54300477302.

It is a de Polignac number, because none of the positive numbers 2^k-20377400345 is a prime.

It is a super-2 number, since 2×20377400345² (a number of 21 digits) contains 22 as substring.

It is an unprimeable number.

It is a polite number, since it can be written in 31 ways as a sum of consecutive naturals, for example, 5631977 + ... + 5635593.

It is an arithmetic number, because the mean of its divisors is an integer number (830982240).

Almost surely, 2^20377400345 is an apocalyptic number.

It is an amenable number.

20377400345 is a deficient number, since it is larger than the sum of its proper divisors (6214031335).

20377400345 is a wasteful number, since it uses less digits than its factorization.

20377400345 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 5585.

The product of its (nonzero) digits is 70560, while the sum is 35.

Adding to 20377400345 its reverse (54300477302), we get a palindrome (74677877647).

The spelling of 20377400345 in words is "twenty billion, three hundred seventy-seven million, four hundred thousand, three hundred forty-five".