20229634136 has 8 divisors (see below), whose sum is σ = 37930564020. Its totient is φ = 10114817064.

The previous prime is 20229634129. The next prime is 20229634141. The reversal of 20229634136 is 63143692202.

It is a tau number, because it is divible by the number of its divisors (8).

It is a self number, because there is not a number n which added to its sum of digits gives 20229634136.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 1264352126 + ... + 1264352141.

Almost surely, 2^20229634136 is an apocalyptic number.

It is an amenable number.

20229634136 is a deficient number, since it is larger than the sum of its proper divisors (17700929884).

20229634136 is a wasteful number, since it uses less digits than its factorization.

20229634136 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 2528704273 (or 2528704269 counting only the distinct ones).

The product of its (nonzero) digits is 93312, while the sum is 38.

The spelling of 20229634136 in words is "twenty billion, two hundred twenty-nine million, six hundred thirty-four thousand, one hundred thirty-six".