20523023465 has 64 divisors (see below), whose sum is σ = 29501521920. Its totient is φ = 13410731520.

The previous prime is 20523023393. The next prime is 20523023473. The reversal of 20523023465 is 56432032502.

It is not a de Polignac number, because 20523023465 - 2¹² = 20523019369 is a prime.

It is a super-3 number, since 3×20523023465³ (a number of 32 digits) contains 333 as substring.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 63 ways as a sum of consecutive naturals, for example, 25367981 + ... + 25368789.

It is an arithmetic number, because the mean of its divisors is an integer number (460961280).

Almost surely, 2^20523023465 is an apocalyptic number.

It is an amenable number.

20523023465 is a deficient number, since it is larger than the sum of its proper divisors (8978498455).

20523023465 is a wasteful number, since it uses less digits than its factorization.

20523023465 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1182.

The product of its (nonzero) digits is 43200, while the sum is 32.

Adding to 20523023465 its reverse (56432032502), we get a palindrome (76955055967).

The spelling of 20523023465 in words is "twenty billion, five hundred twenty-three million, twenty-three thousand, four hundred sixty-five".