202894139051 has 4 divisors (see below), whose sum is σ = 202905824400. Its totient is φ = 202882453704.

The previous prime is 202894138973. The next prime is 202894139053. The reversal of 202894139051 is 150931498202.

It is a semiprime because it is the product of two primes.

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-202894139051 is a prime.

It is a super-2 number, since 2×202894139051² (a number of 23 digits) contains 22 as substring.

It is a Duffinian number.

It is a junction number, because it is equal to n+sod(n) for n = 202894138993 and 202894139011.

It is not an unprimeable number, because it can be changed into a prime (202894139053) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 5816591 + ... + 5851368.

It is an arithmetic number, because the mean of its divisors is an integer number (50726456100).

Almost surely, 2^202894139051 is an apocalyptic number.

202894139051 is a deficient number, since it is larger than the sum of its proper divisors (11685349).

202894139051 is a wasteful number, since it uses less digits than its factorization.

202894139051 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 11685348.

The product of its (nonzero) digits is 155520, while the sum is 44.

The spelling of 202894139051 in words is "two hundred two billion, eight hundred ninety-four million, one hundred thirty-nine thousand, fifty-one".