20421464552662 has 4 divisors (see below), whose sum is σ = 30632196828996. Its totient is φ = 10210732276330.

The previous prime is 20421464552653. The next prime is 20421464552669. The reversal of 20421464552662 is 26625546412402.

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

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (20421464552669) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 5105366138164 + ... + 5105366138167.

It is an arithmetic number, because the mean of its divisors is an integer number (7658049207249).

Almost surely, 2^{20421464552662} is an apocalyptic number.

20421464552662 is a deficient number, since it is larger than the sum of its proper divisors (10210732276334).

20421464552662 is a wasteful number, since it uses less digits than its factorization.

20421464552662 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 10210732276333.

The product of its (nonzero) digits is 5529600, while the sum is 49.

The spelling of 20421464552662 in words is "twenty trillion, four hundred twenty-one billion, four hundred sixty-four million, five hundred fifty-two thousand, six hundred sixty-two".