20501234521 has 8 divisors (see below), whose sum is σ = 20625756800. Its totient is φ = 20376927648.

The previous prime is 20501234519. The next prime is 20501234531. The reversal of 20501234521 is 12543210502.

It is a sphenic number, since it is the product of 3 distinct primes.

It is a cyclic number.

It is not a de Polignac number, because 20501234521 - 2¹ = 20501234519 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (20501234531) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 139165 + ... + 245701.

It is an arithmetic number, because the mean of its divisors is an integer number (2578219600).

Almost surely, 2^20501234521 is an apocalyptic number.

It is an amenable number.

20501234521 is a deficient number, since it is larger than the sum of its proper divisors (124522279).

20501234521 is a wasteful number, since it uses less digits than its factorization.

20501234521 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 107703.

The product of its (nonzero) digits is 2400, while the sum is 25.

The spelling of 20501234521 in words is "twenty billion, five hundred one million, two hundred thirty-four thousand, five hundred twenty-one".