20724212475 has 168 divisors, whose sum is σ = 41041800240. Its totient is φ = 10346434560.

The previous prime is 20724212471. The next prime is 20724212479. The reversal of 20724212475 is 57421242702.

20724212475 is a `hidden beast` number, since 207 + 2 + 421 + 24 + 7 + 5 = 666.

It is an interprime number because it is at equal distance from previous prime (20724212471) and next prime (20724212479).

It is not a de Polignac number, because 20724212475 - 2² = 20724212471 is a prime.

It is not an unprimeable number, because it can be changed into a prime (20724212471) by changing a digit.

It is a polite number, since it can be written in 167 ways as a sum of consecutive naturals, for example, 33588367 + ... + 33588983.

It is an arithmetic number, because the mean of its divisors is an integer number (244296430).

Almost surely, 2^20724212475 is an apocalyptic number.

20724212475 is a gapful number since it is divisible by the number (25) formed by its first and last digit.

20724212475 is a deficient number, since it is larger than the sum of its proper divisors (20317587765).

20724212475 is an equidigital number, since it uses as much as digits as its factorization.

20724212475 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 761 (or 741 counting only the distinct ones).

The product of its (nonzero) digits is 62720, while the sum is 36.

The spelling of 20724212475 in words is "twenty billion, seven hundred twenty-four million, two hundred twelve thousand, four hundred seventy-five".