20642462225 has 24 divisors (see below), whose sum is σ = 31912713408. Its totient is φ = 12868027200.

The previous prime is 20642462213. The next prime is 20642462287. The reversal of 20642462225 is 52226424602.

It is not a de Polignac number, because 20642462225 - 2⁴ = 20642462209 is a prime.

It is a super-2 number, since 2×20642462225² (a number of 21 digits) contains 22 as substring.

It is a Harshad number since it is a multiple of its sum of digits (35).

It is a Duffinian number.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 23 ways as a sum of consecutive naturals, for example, 5359754 + ... + 5363603.

It is an arithmetic number, because the mean of its divisors is an integer number (1329696392).

Almost surely, 2^20642462225 is an apocalyptic number.

20642462225 is a gapful number since it is divisible by the number (25) formed by its first and last digit.

It is an amenable number.

20642462225 is a deficient number, since it is larger than the sum of its proper divisors (11270251183).

20642462225 is a wasteful number, since it uses less digits than its factorization.

20642462225 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 10723385 (or 10723380 counting only the distinct ones).

The product of its (nonzero) digits is 92160, while the sum is 35.

Adding to 20642462225 its reverse (52226424602), we get a palindrome (72868886827).

The spelling of 20642462225 in words is "twenty billion, six hundred forty-two million, four hundred sixty-two thousand, two hundred twenty-five".