20894662503 has 64 divisors (see below), whose sum is σ = 36720552960. Its totient is φ = 11575612800.

The previous prime is 20894662499. The next prime is 20894662513. The reversal of 20894662503 is 30526649802.

20894662503 is a `hidden beast` number, since 2 + 0 + 89 + 4 + 6 + 62 + 503 = 666.

It is not a de Polignac number, because 20894662503 - 2² = 20894662499 is a prime.

It is a super-2 number, since 2×20894662503² (a number of 21 digits) contains 22 as substring.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (20894662513) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (23) of ones.

It is a polite number, since it can be written in 63 ways as a sum of consecutive naturals, for example, 371413 + ... + 423953.

It is an arithmetic number, because the mean of its divisors is an integer number (573758640).

Almost surely, 2^20894662503 is an apocalyptic number.

20894662503 is a deficient number, since it is larger than the sum of its proper divisors (15825890457).

20894662503 is a wasteful number, since it uses less digits than its factorization.

20894662503 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 52677 (or 52671 counting only the distinct ones).

The product of its (nonzero) digits is 622080, while the sum is 45.

The spelling of 20894662503 in words is "twenty billion, eight hundred ninety-four million, six hundred sixty-two thousand, five hundred three".