20299621724 has 24 divisors (see below), whose sum is σ = 37351776000. Its totient is φ = 9639161280.

The previous prime is 20299621721. The next prime is 20299621729. The reversal of 20299621724 is 42712699202.

It is a happy number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (20299621721) 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, 1427324 + ... + 1441475.

It is an arithmetic number, because the mean of its divisors is an integer number (1556324000).

Almost surely, 2^20299621724 is an apocalyptic number.

It is an amenable number.

20299621724 is a deficient number, since it is larger than the sum of its proper divisors (17052154276).

20299621724 is a wasteful number, since it uses less digits than its factorization.

20299621724 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 2868893 (or 2868891 counting only the distinct ones).

The product of its (nonzero) digits is 217728, while the sum is 44.

The spelling of 20299621724 in words is "twenty billion, two hundred ninety-nine million, six hundred twenty-one thousand, seven hundred twenty-four".