20632145230621 has 4 divisors (see below), whose sum is σ = 21718047611200. Its totient is φ = 19546242850044.

The previous prime is 20632145230607. The next prime is 20632145230637. The reversal of 20632145230621 is 12603254123602.

It is a semiprime because it is the product of two primes, and also a Blum integer, because the two primes are equal to 3 mod 4.

It is a cyclic number.

It is not a de Polignac number, because 20632145230621 - 2⁷ = 20632145230493 is a prime.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (20632145230661) 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, 542951190261 + ... + 542951190298.

It is an arithmetic number, because the mean of its divisors is an integer number (5429511902800).

Almost surely, 2^{20632145230621} is an apocalyptic number.

It is an amenable number.

20632145230621 is a deficient number, since it is larger than the sum of its proper divisors (1085902380579).

20632145230621 is a wasteful number, since it uses less digits than its factorization.

20632145230621 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1085902380578.

The product of its (nonzero) digits is 103680, while the sum is 37.

The spelling of 20632145230621 in words is "twenty trillion, six hundred thirty-two billion, one hundred forty-five million, two hundred thirty thousand, six hundred twenty-one".