20477102545 has 16 divisors (see below), whose sum is σ = 25722455040. Its totient is φ = 15629947200.

The previous prime is 20477102537. The next prime is 20477102573. The reversal of 20477102545 is 54520177402.

It is not a de Polignac number, because 20477102545 - 2³ = 20477102537 is a prime.

It is an unprimeable number.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 919350 + ... + 941359.

It is an arithmetic number, because the mean of its divisors is an integer number (1607653440).

Almost surely, 2^20477102545 is an apocalyptic number.

It is an amenable number.

20477102545 is a deficient number, since it is larger than the sum of its proper divisors (5245352495).

20477102545 is a wasteful number, since it uses less digits than its factorization.

20477102545 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1860816.

The product of its (nonzero) digits is 78400, while the sum is 37.

Adding to 20477102545 its reverse (54520177402), we get a palindrome (74997279947).

The spelling of 20477102545 in words is "twenty billion, four hundred seventy-seven million, one hundred two thousand, five hundred forty-five".