29997465390520 has 16 divisors (see below), whose sum is σ = 67494297128760. Its totient is φ = 11998986156192.

The previous prime is 29997465390517. The next prime is 29997465390533. The reversal of 29997465390520 is 2509356479992.

It is a super-2 number, since 2×29997465390520² (a number of 28 digits) contains 22 as substring.

It is a self number, because there is not a number n which added to its sum of digits gives 29997465390520.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 374968317342 + ... + 374968317421.

Almost surely, 2^{29997465390520} is an apocalyptic number.

29997465390520 is a gapful number since it is divisible by the number (20) formed by its first and last digit.

It is an amenable number.

29997465390520 is an abundant number, since it is smaller than the sum of its proper divisors (37496831738240).

It is a pseudoperfect number, because it is the sum of a subset of its proper divisors.

29997465390520 is a wasteful number, since it uses less digits than its factorization.

29997465390520 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 749936634774 (or 749936634770 counting only the distinct ones).

The product of its (nonzero) digits is 330674400, while the sum is 70.

The spelling of 29997465390520 in words is "twenty-nine trillion, nine hundred ninety-seven billion, four hundred sixty-five million, three hundred ninety thousand, five hundred twenty".