213738504903 has 24 divisors (see below), whose sum is σ = 384914365056. Its totient is φ = 111032989200.

The previous prime is 213738504871. The next prime is 213738504949. The reversal of 213738504903 is 309405837312.

213738504903 is a `hidden beast` number, since 2 + 13 + 73 + 85 + 0 + 490 + 3 = 666.

It is not a de Polignac number, because 213738504903 - 2⁵ = 213738504871 is a prime.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (213738504983) by changing a digit.

It is a polite number, since it can be written in 23 ways as a sum of consecutive naturals, for example, 154211793 + ... + 154213178.

It is an arithmetic number, because the mean of its divisors is an integer number (16038098544).

Almost surely, 2^213738504903 is an apocalyptic number.

213738504903 is a deficient number, since it is larger than the sum of its proper divisors (171175860153).

213738504903 is a wasteful number, since it uses less digits than its factorization.

213738504903 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 308424995 (or 308424992 counting only the distinct ones).

The product of its (nonzero) digits is 544320, while the sum is 45.

The spelling of 213738504903 in words is "two hundred thirteen billion, seven hundred thirty-eight million, five hundred four thousand, nine hundred three".