20621124242 has 16 divisors (see below), whose sum is σ = 31360750080. Its totient is φ = 10167589152.

The previous prime is 20621124217. The next prime is 20621124299. The reversal of 20621124242 is 24242112602.

It is an unprimeable number.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 1476263 + ... + 1490165.

It is an arithmetic number, because the mean of its divisors is an integer number (1960046880).

Almost surely, 2^20621124242 is an apocalyptic number.

20621124242 is a deficient number, since it is larger than the sum of its proper divisors (10739625838).

20621124242 is a wasteful number, since it uses less digits than its factorization.

20621124242 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 24137.

The product of its (nonzero) digits is 3072, while the sum is 26.

Adding to 20621124242 its reverse (24242112602), we get a palindrome (44863236844).

The spelling of 20621124242 in words is "twenty billion, six hundred twenty-one million, one hundred twenty-four thousand, two hundred forty-two".