20234157988 has 72 divisors (see below), whose sum is σ = 39772343520. Its totient is φ = 8931571200.

The previous prime is 20234157949. The next prime is 20234157989. The reversal of 20234157988 is 88975143202.

It is a super-2 number, since 2×20234157988² (a number of 21 digits) contains 22 as substring.

It is not an unprimeable number, because it can be changed into a prime (20234157989) by changing a digit.

It is a polite number, since it can be written in 23 ways as a sum of consecutive naturals, for example, 13588348 + ... + 13589836.

It is an arithmetic number, because the mean of its divisors is an integer number (552393660).

Almost surely, 2^20234157988 is an apocalyptic number.

It is an amenable number.

20234157988 is a deficient number, since it is larger than the sum of its proper divisors (19538185532).

20234157988 is a wasteful number, since it uses less digits than its factorization.

20234157988 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1709 (or 1646 counting only the distinct ones).

The product of its (nonzero) digits is 967680, while the sum is 49.

The spelling of 20234157988 in words is "twenty billion, two hundred thirty-four million, one hundred fifty-seven thousand, nine hundred eighty-eight".